rhsa-2026:93412
HIGH CVSS 7.5 csaf_suse
Description
security update for kernel
Timeline
- Published
- 2026-11-01 00:00 UTC
- Last Modified
- 2026-11-04
CVSS Details
CVSS details not available.
Affected Products
No product information available.
References
No references available.
Linked Vulnerabilities
No linked vulnerabilities found.
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"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: sit: reload inner IPv6 header after GSO offloads\n\nipip6_tunnel_xmit() caches the inner IPv6 header pointer at function\nentry and continues using it after iptunnel_handle_offloads().\n\nFor GSO skbs, iptunnel_handle_offloads() calls skb_header_unclone().\nWhen the skb header is cloned, skb_header_unclone() can call\npskb_expand_head(), which may move the skb head. The pskb_expand_head()\ncontract requires pointers into the skb header to be reloaded after the\ncall.\n\nIf the later skb_realloc_headroom() branch is not taken, SIT uses the\nstale iph6 pointer to read the inner hop limit and DS field. That can\nread from a freed skb head after the old head's remaining clone is\nreleased.\n\nReload iph6 after the offload helper succeeds and before subsequent\nreads from the inner IPv6 header. Keep the existing reload after\nskb_realloc_headroom(), since that branch can also replace the skb.",
"title": "CVE description"
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{
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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"threats": [
{
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"date": "2026-11-01T00:00:00Z",
"details": "moderate"
}
],
"title": "CVE-2026-53228"
},
{
"cve": "CVE-2026-53270",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-53270"
}
],
"notes": [
{
"category": "general",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: clear the svc scheduler ptr early on edit\n\nip_vs_edit_service() while unbinding the old scheduler clears\nthe svc->scheduler ptr after the scheduler module initiates\nRCU callbacks. This can cause packets to use the old\nscheduler at the time when svc->sched_data is already freed\nafter RCU grace period.\n\nFix it by clearing the ptr early in ip_vs_unbind_scheduler(),\nbefore the done_service method schedules any RCU callbacks.\n\nAlso, if the new scheduler fails to initialize when replacing\nthe old scheduler, try to restore the old scheduler while still\nreturning the error code.",
"title": "CVE description"
}
],
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{
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"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: fsl-lpspi: terminate the RX channel on TX prepare failure path\n\nWhen dmaengine_prep_slave_sg() fails for the TX channel, the error path\nterminates the TX DMA channel but leaves the RX channel running. Since\nthe RX channel was already submitted and issued prior to preparing\nthe TX descriptor, returning -EINVAL causes the SPI core to unmap the\nDMA buffers while the RX DMA engine continues writing to them, leading\nto potential memory corruption or use-after-free.\n\nTerminate the RX channel before returning on the TX prepare failure path.",
"title": "CVE description"
}
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{
"category": "general",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: pm: userspace: fix use-after-free in get_local_id\n\nIn mptcp_pm_userspace_get_local_id(), the address entry is looked up under\nspinlock, but its id is read after dropping the lock. A concurrent deletion\ncan free the entry between the unlock and the read, leading to UAF.\n\nThe race window is narrow. It was reproduced only with a locally\nconstructed stress test that repeatedly overlaps an MP_JOIN SYN with a\nMPTCP_PM_CMD_SUBFLOW_DESTROY request.\n\nHowever, the KASAN report below confirms that the race is reachable:\n\n [ 666.319376] BUG: KASAN: slab-use-after-free in mptcp_userspace_pm_get_local_id+0x1dc/0x1f0\n [ 666.319386] Read of size 1 at addr ffff888124845610 by task swapper/0/0\n ...\n [ 666.319401] Call Trace:\n [ 666.319405] <IRQ>\n [ 666.319408] dump_stack_lvl+0x53/0x70\n [ 666.319412] print_address_description.constprop.0+0x2c/0x3b0\n [ 666.319418] print_report+0xbe/0x2b0\n [ 666.319421] ? mptcp_userspace_pm_get_local_id+0x1dc/0x1f0\n [ 666.319423] kasan_report+0xce/0x100\n [ 666.319426] ? mptcp_userspace_pm_get_local_id+0x1dc/0x1f0\n [ 666.319429] mptcp_userspace_pm_get_local_id+0x1dc/0x1f0\n [ 666.319433] mptcp_pm_get_local_id+0x371/0x440\n ...\n [ 666.319821] Allocated by task 45539:\n [ 666.319844] kasan_save_stack+0x33/0x60\n [ 666.319855] kasan_save_track+0x14/0x30\n [ 666.319858] __kasan_kmalloc+0x8f/0xa0\n [ 666.319863] __kmalloc_noprof+0x1e7/0x520\n [ 666.319867] sock_kmalloc+0xdf/0x130\n [ 666.319885] sock_kmemdup+0x1b/0x40\n [ 666.319888] mptcp_userspace_pm_append_new_local_addr+0x261/0x500\n [ 666.319910] mptcp_pm_nl_announce_doit+0x16a/0x610\n ...\n [ 666.319967] Freed by task 45560:\n [ 666.319988] kasan_save_stack+0x33/0x60\n [ 666.319991] kasan_save_track+0x14/0x30\n [ 666.319994] kasan_save_free_info+0x3b/0x60\n [ 666.319998] __kasan_slab_free+0x43/0x70\n [ 666.320000] kfree+0x166/0x440\n [ 666.320003] sock_kfree_s+0x1d/0x50\n [ 666.320007] mptcp_userspace_pm_delete_local_addr.isra.0+0x157/0x200\n [ 666.320011] mptcp_pm_nl_subflow_destroy_doit+0x51d/0xea0\n\nFix by copying the id into a local variable while still holding the lock,\nand use -1 as a \"not found\" sentinel.",
"title": "CVE description"
}
],
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"references": [
{
"category": "external",
"summary": "CVE-2026-68169",
"url": "https://www.suse.com/security/cve/CVE-2026-68169"
},
{
"category": "external",
"summary": "SUSE Bug 1274952 for CVE-2026-68169",
"url": "https://bugzilla.suse.com/1274952"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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"scores": [
{
"cvss_v3": {
"baseScore": 3.6,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:L",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"date": "2026-11-01T00:00:00Z",
"details": "low"
}
],
"title": "CVE-2026-68169"
},
{
"cve": "CVE-2026-72083",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-72083"
}
],
"notes": [
{
"category": "general",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE\n\ncore_scsi3_emulate_pro_register_and_move() maps the PERSISTENT RESERVE OUT\nparameter list with transport_kmap_data_sg() and parses the destination\nTransportID with target_parse_pr_out_transport_id(). For an iSCSI\nTransportID (FORMAT CODE 01b), iscsi_parse_pr_out_transport_id() returns\nthe ISID in iport_ptr as a raw pointer into that mapped buffer.\n\nThe function then unmaps the buffer with transport_kunmap_data_sg() before\ndereferencing iport_ptr in strcmp(), __core_scsi3_locate_pr_reg() and\ncore_scsi3_alloc_registration(). When the parameter list spans more than\none page (PARAMETER LIST LENGTH > 4096), transport_kmap_data_sg() uses\nvmap() and transport_kunmap_data_sg() does vunmap(), so the kernel virtual\naddress backing iport_ptr is torn down and every subsequent dereference is\na use-after-free read of the unmapped region.\n\nKeep the parameter list mapped until iport_ptr is no longer needed: drop\nthe early transport_kunmap_data_sg() and unmap once on the success path,\nright before returning. The error paths already unmap through the existing\n\"if (buf) transport_kunmap_data_sg(cmd)\" at the out: label, which now runs\non every post-map error exit because buf is no longer cleared early. Only\nreads of the mapping happen while spinlocks are held; the map and unmap\ncalls remain outside any lock. The sibling caller\ncore_scsi3_decode_spec_i_port() already uses the buffer before unmapping it\nand is left unchanged.",
"title": "CVE description"
}
],
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{
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"date": "2026-11-01T00:00:00Z",
"details": "important"
}
],
"title": "CVE-2026-72083"
},
{
"cve": "CVE-2026-74283",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-74283"
}
],
"notes": [
{
"category": "general",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: require net admin for TIPCv2 netlink mutators\n\nTIPCv2 registers mutating generic-netlink operations without admin\npermission flags. Generic netlink only checks CAP_NET_ADMIN when an\noperation sets GENL_ADMIN_PERM or GENL_UNS_ADMIN_PERM, so a local\nunprivileged process can currently change TIPC state through commands\nsuch as TIPC_NL_NET_SET, TIPC_NL_KEY_SET, TIPC_NL_KEY_FLUSH, and\nbearer enable/disable.\n\nThe legacy TIPC netlink API already checks netlink_net_capable(...,\nCAP_NET_ADMIN) for administrative commands. Give the TIPCv2 mutators\nthe equivalent generic-netlink gate. Use GENL_UNS_ADMIN_PERM, which\nmaps to the same namespace-aware CAP_NET_ADMIN check that\nnetlink_net_capable() performs, so the behaviour matches the legacy\npath and keeps working for CAP_NET_ADMIN holders in a non-initial user\nnamespace (containers).\n\nA QEMU/KASAN repro run as uid/gid 65534 with zero effective\ncapabilities previously succeeded in changing the network id and node\nidentity, setting and flushing key material, and enabling/disabling a\nUDP bearer. With this patch applied the same operations fail with\n-EPERM.",
"title": "CVE description"
}
],
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{
"category": "impact",
"date": "2026-11-01T00:00:00Z",
"details": "important"
}
],
"title": "CVE-2026-74283"
},
{
"cve": "CVE-2026-74510",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-74510"
}
],
"notes": [
{
"category": "general",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: mgmt: fix UAF in pair command cancellation\n\nThe pairing completion and authentication failure callbacks look up the\npending MGMT_OP_PAIR_DEVICE command by walking hdev->mgmt_pending. The\nlookup returned a command that was still linked on the shared pending list,\nwithout keeping mgmt_pending_lock held for the later dereference and\nremoval.\n\nA concurrent MGMT_OP_CANCEL_PAIR_DEVICE request can remove and free the\nsame pending command before the callback uses it. The reverse race is also\npossible when cancel_pair_device() gets a command from pending_find() and a\ncallback removes it before the cancel path dereferences it. This can lead\nto a use-after-free and a second list_del().\n\nMake the pairing lookup helpers transfer ownership of the pending command\nby removing it from hdev->mgmt_pending while holding mgmt_pending_lock.\nThe callbacks and cancel path then complete the command and free it\ndirectly, so racing paths cannot find or free the same command again. Take\na temporary hci_conn reference in cancel_pair_device() because the command\ncompletion drops the reference stored in the pending command.",
"title": "CVE description"
}
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{
"category": "external",
"summary": "CVE-2026-74510",
"url": "https://www.suse.com/security/cve/CVE-2026-74510"
},
{
"category": "external",
"summary": "SUSE Bug 1275950 for CVE-2026-74510",
"url": "https://bugzilla.suse.com/1275950"
}
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{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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"scores": [
{
"cvss_v3": {
"baseScore": 6.4,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"details": "moderate"
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"title": "CVE-2026-74510"
},
{
"cve": "CVE-2026-74582",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-74582"
}
],
"notes": [
{
"category": "general",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\npacket: use consistent hard_header_len in non-ring send paths\n\npacket_snd() reads dev->hard_header_len multiple times while allocating\nand constructing an skb. Device reconfiguration can change this value\nconcurrently, for example through bonding device type changes.\n\nFor SOCK_RAW, packet_snd() can save a larger value in reserve and later\nallocate headroom using a smaller value. Moving skb->data back by reserve\nthen places it before skb->head, and the following copy from userspace can\nattempt an out-of-bounds write.\n\npacket_sendmsg_spkt() has the same issue because it calculates its\nreservation and header offset from separate reads before dropping the RCU\nread lock to allocate the skb.\n\nAdd LL_RESERVED_SPACE_EX() for callers that already saved a header length.\nRead hard_header_len once in packet_snd() and use it for allocation and\nconstruction. In packet_sendmsg_spkt(), preserve the allocation-time value\nthrough the device lookup retry.\n\nThe separate SOCK_DGRAM consistency problem between hard_header_len and\nheader_ops->create is not addressed here.",
"title": "CVE description"
}
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{
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{
"category": "impact",
"date": "2026-11-01T00:00:00Z",
"details": "important"
}
],
"title": "CVE-2026-74582"
},
{
"cve": "CVE-2026-80586",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-80586"
}
],
"notes": [
{
"category": "general",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: options: reset DSS fields in case of unexpected size\n\nA remote peer could send a malformed DSS with a wrong size, followed by\nanother DSS or MPC + Data. In this case, the first suboption will be\nignored, but leaving some fields written, which could lead to\ninconsistency or access uninitialized data.\n\nExplicitly reset the fields that could have been modified in case of\nunexpected size.",
"title": "CVE description"
}
],
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{
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"ids": [
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"text": "https://www.suse.com/security/cve/CVE-2026-89603"
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"category": "general",
"text": "This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.",
"title": "CVE description"
}
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"title": "CVE-2026-89603"
},
{
"cve": "CVE-2026-90011",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-90011"
}
],
"notes": [
{
"category": "general",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: iscsi: Reserve a terminator byte for the login payload\n\niscsi_target_check_login_request() rejects a login PDU whose\nDataSegmentLength exceeds MAX_KEY_VALUE_PAIRS, but the test is '>' and\nlogin->req_buf is allocated with exactly MAX_KEY_VALUE_PAIRS\nbytes. Since iscsit_get_login_rx() receives payload_length + padding\nbytes, where\n\n\tpadding = ((-payload_length) & 3);\n\nany payload_length from 8189 to 8192 fills the whole 8192 byte\nbuffer. The write stays in bounds, but no byte is left for a NUL\nterminator.\n\nThe buffer is subsequently consumed as a C string. In the CHAP path\nchap_check_algorithm() calls kstrdup(a_str), and extract_param() calls\nstrstr(in_buf, pattern) followed by strlen_semi(), none of which take a\nlength. convert_null_to_semi() additionally rewrites every embedded NUL\nto ';', so even a payload made of well formed NUL separated key=value\nrecords is left without a terminator. These walk past the end of the\nobject into adjacent slab memory. It is reachable by an unauthenticated\ninitiator against a portal configured for CHAP; when authentication is\nnot required iscsi_login_zero_tsih_s2() rewrites AuthMethod to None and\nthe CHAP path is never entered.\n\nAllocate one extra byte. kzalloc() zeroes it and nothing ever writes to\nit, as every writer copies to offset 0 for at most MAX_KEY_VALUE_PAIRS\nbytes, so the buffer is always terminated.",
"title": "CVE description"
}
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"summary": "SUSE Bug 1281280 for CVE-2026-90011",
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{
"cvss_v3": {
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"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"version": "3.1"
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"threats": [
{
"category": "impact",
"date": "2026-11-01T00:00:00Z",
"details": "important"
}
],
"title": "CVE-2026-90011"
},
{
"cve": "CVE-2026-93787",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-93787"
}
],
"notes": [
{
"category": "general",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: bound dirent name against end of SMB response in cifs_filldir\n\ncifs_filldir() copies the entry name out of an SMB1 TRANS2_FIND_FIRST /\nFIND_NEXT response using a length (de.namelen) supplied by the server.\nThe kmalloc'd SMB response buffer is bounded, but nothing checks that\nde.name + de.namelen still lies inside that buffer before the eventual\nfilldir64() -> verify_dirent_name() -> memchr() reads namelen bytes.\n\nA hostile SMB1 server that returns an oversized FileNameLength in a\ndirectory entry therefore causes memchr() to read past the end of the\nresponse slab buffer. Reachable from any user who can list a directory\non a CIFS mount served by an attacker-controlled server (getdents64()\non the mounted directory):\n\n BUG: KASAN: slab-out-of-bounds in memchr+0x71/0x80\n Read of size 1 at addr ffff88800e0640cc by task poc/115\n Call Trace:\n dump_stack_lvl+0x64/0x80\n print_report+0xce/0x620\n kasan_report+0xec/0x120\n memchr+0x71/0x80\n filldir64+0x4c/0x6a0\n cifs_filldir.constprop.0+0x9bb/0x1e00\n cifs_readdir+0x2101/0x3380\n iterate_dir+0x19c/0x520\n __x64_sys_getdents64+0x126/0x210\n do_syscall_64+0x107/0x5a0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nPass the end-of-response pointer down to cifs_filldir() and reject\nentries whose name would extend past that boundary.\n\nThis bug was discovered by Artiphishell's vTriage pipeline, which\ngenerated a userspace reproducer (an emulated hostile SMB1 server plus\na getdents64() client) that reliably triggers the KASAN report on an\nunpatched kernel. The fix below was drafted with the Claude coding\nassistant; a userspace reproducer is available on request.",
"title": "CVE description"
}
],
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"threats": [
{
"category": "impact",
"date": "2026-11-01T00:00:00Z",
"details": "important"
}
],
"title": "CVE-2026-93787"
},
{
"cve": "CVE-2026-93827",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-93827"
}
],
"notes": [
{
"category": "general",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio-fs: avoid double-free on failed queue setup\n\nvirtio_fs_setup_vqs() allocates fs->vqs and fs->mq_map before calling\nvirtio_find_vqs(). If virtio_find_vqs() fails, the error path frees both\npointers and returns an error to virtio_fs_probe().\n\nvirtio_fs_probe() then drops the last kobject reference, and\nvirtio_fs_ktype_release() frees fs->vqs and fs->mq_map again. This leaves\ndangling pointers in struct virtio_fs and can trigger a double-free during\nprobe failure cleanup.\n\nSet fs->vqs and fs->mq_map to NULL immediately after kfree() in the\nvirtio_fs_setup_vqs() error path so that the later kobject release sees an\nuninitialized state and kfree(NULL) becomes harmless.\n\nThis can be reproduced when a broken virtio-fs device advertises more\nrequest queues than the transport actually provides. In that case\nvirtio_find_vqs() fails while setting up the extra queue, and the probe\npath reaches the double-free cleanup sequence.",
"title": "CVE description"
}
],
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"category": "external",
"summary": "CVE-2026-93827",
"url": "https://www.suse.com/security/cve/CVE-2026-93827"
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{
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"summary": "SUSE Bug 1282747 for CVE-2026-93827",
"url": "https://bugzilla.suse.com/1282747"
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"threats": [
{
"category": "impact",
"date": "2026-11-01T00:00:00Z",
"details": "moderate"
}
],
"title": "CVE-2026-93827"
},
{
"cve": "CVE-2026-98364",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-98364"
}
],
"notes": [
{
"category": "general",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: hold net_device reference under RCU in bundle creation\n\nxfrm_bundle_create() and xfrm_create_dummy_bundle() read dst->dev into\na local pointer without taking a device reference, then pass it to\nxfrm_fill_dst(). A concurrent RTM_DELLINK replaces dst->dev via\ndst_dev_put() and frees the old net_device, causing a use-after-free\nwhen xfrm6_fill_dst() later dereferences the stale dev pointer.\n\n BUG: KASAN: slab-use-after-free in xfrm6_fill_dst+0x82c/0x860\n (net/ipv6/xfrm6_policy.c:86 netdev_hold())\n Read of size 8 at addr ffff8880142fe588 by task exploit/153\n Call Trace:\n xfrm6_fill_dst+0x82c/0x860\n xfrm_resolve_and_create_bundle+0x21d4/0x2bd0\n xfrm_lookup_with_ifid+0x485/0x1640\n ip6_dst_lookup_flow+0x19b/0x1e0\n udpv6_sendmsg+0x1443/0x2dd0\n\nFix this by reading dst->dev via dst_dev_rcu() and keeping the RCU\nread-side critical section active until xfrm_fill_dst() has taken the\nrequired device references.",
"title": "CVE description"
}
],
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"references": [
{
"category": "external",
"summary": "CVE-2026-98364",
"url": "https://www.suse.com/security/cve/CVE-2026-98364"
},
{
"category": "external",
"summary": "SUSE Bug 1284653 for CVE-2026-98364",
"url": "https://bugzilla.suse.com/1284653"
},
{
"category": "external",
"summary": "SUSE Bug 1284654 for CVE-2026-98364",
"url": "https://bugzilla.suse.com/1284654"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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"scores": [
{
"cvss_v3": {
"baseScore": 7,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"details": "important"
}
],
"title": "CVE-2026-98364"
},
{
"cve": "CVE-2026-98432",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-98432"
}
],
"notes": [
{
"category": "general",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: free inet_opt and ireq_opt after an RCU grace period\n\ntcp_v4_syn_recv_sock() transfers ownership of ireq->ireq_opt to the\nchild socket (newinet->inet_opt) without copying it.\n\nAnother cpu can concurrently process a retransmitted SYN for the same\nrequest socket, and send a SYNACK from tcp_check_req().\ntcp_v4_send_synack() and inet_csk_route_req() read ireq->ireq_opt\nunder rcu_read_lock() only, and ip_build_and_send_pkt() and\nip_options_build() then read opt->optlen twice.\n\nNote that the SYNACK timer itself is not an issue: it holds a\nreference on its request socket, and inet_csk_reqsk_queue_drop()\ncalls timer_delete_sync() before the child can be freed.\n\nSince commit 079096f103fa (\"tcp/dccp: install syn_recv requests\ninto ehash table\"), request sockets are processed without holding\nthe listener lock, so nothing prevents the child socket from being\nfreed while the SYNACK is still being built. TCP child sockets do\nnot have SOCK_RCU_FREE, and inet_sock_destruct() frees inet_opt\nwith a plain kfree(), leading to a use-after-free in\nip_options_build().\n\nA similar issue exists with request socket migration\n(net.ipv4.tcp_migrate_req=1, or a BPF_SK_REUSEPORT_SELECT_OR_MIGRATE\nprogram). reqsk_timer_handler() clones the request socket with\ninet_reqsk_clone(), so that the old request socket and its clone\nshare the same ireq_opt, then reqsk_migrate_reset() clears the\npointer in the old one. Another cpu holding a reference on the old\nrequest socket can still be using these options (sending a SYNACK,\nor creating a child in tcp_v4_syn_recv_sock()) when the clone is\nfreed, and tcp_v4_reqsk_destructor() also uses a plain kfree().\n\nReaders already use RCU, and other paths replacing inet_opt\n(do_ip_setsockopt(), cipso_v4_sock_setattr()...) already use\nkfree_rcu(). Use kfree_rcu() in inet_sock_destruct() and\ntcp_v4_reqsk_destructor() as well.\n\nIPv6 is not affected by the first issue, because tcp_v6_syn_recv_sock()\nduplicates the options. tcp_v6_reqsk_destructor() has the same\nmigration issue with ipv6_opt, which is only set by CALIPSO. This\nwill be addressed in a separate patch.",
"title": "CVE description"
}
],
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"details": "important"
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"title": "CVE-2026-98432"
},
{
"cve": "CVE-2026-98466",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-98466"
}
],
"notes": [
{
"category": "general",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Transfer the hyp stack pages out of the host stage-2\n\nfix_host_ownership() walks only the linear-map alias of each memblock\nregion, and the per-CPU hyp stack, mapped in the private VA range for\nits guard page, has none.\n\nWalk each stack's VA range with the same walker.",
"title": "CVE description"
}
],
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"category": "impact",
"date": "2026-11-01T00:00:00Z",
"details": "important"
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],
"title": "CVE-2026-98466"
},
{
"cve": "CVE-2026-98725",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-98725"
}
],
"notes": [
{
"category": "general",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()\n\nnvmet_auth_challenge() receives its output buffer as a void pointer.\nsizeof(*d) therefore evaluates to one with GCC and undercounts the fixed\nchallenge header by 15 bytes. A short AUTH_RECEIVE buffer can pass the\ncheck before the challenge is copied past the end of its allocation.\n\nUse the typed challenge pointer when calculating the response size.\n\n BUG: KASAN: slab-out-of-bounds in nvmet_execute_auth_receive (drivers/nvme/target/fabrics-cmd-auth.c:442 drivers/nvme/target/fabrics-cmd-auth.c:569)\n Write of size 32 by task kworker/1:1H/64\n Workqueue: nvmet_tcp_wq nvmet_tcp_io_work\n Call Trace:\n nvmet_execute_auth_receive (drivers/nvme/target/fabrics-cmd-auth.c:442 drivers/nvme/target/fabrics-cmd-auth.c:569)\n nvmet_tcp_try_recv_pdu (drivers/nvme/target/tcp.c:1119 drivers/nvme/target/tcp.c:1243)\n nvmet_tcp_io_work (drivers/nvme/target/tcp.c:1350 drivers/nvme/target/tcp.c:1382 drivers/nvme/target/tcp.c:1445)\n process_one_work (kernel/workqueue.c:3322)\n worker_thread (kernel/workqueue.c:3405 kernel/workqueue.c:3486)\n kthread (kernel/kthread.c:436)\n ret_from_fork (arch/x86/kernel/process.c:158)\n ret_from_fork_asm (arch/x86/entry/entry_64.S:245)\n The buggy address is located 16 bytes inside of\n allocated 33-byte region [ffff888000554e80, ffff888000554ea1)\n Kernel panic - not syncing: KASAN: panic_on_warn set ...",
"title": "CVE description"
}
],
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"references": [
{
"category": "external",
"summary": "CVE-2026-98725",
"url": "https://www.suse.com/security/cve/CVE-2026-98725"
},
{
"category": "external",
"summary": "SUSE Bug 1286731 for CVE-2026-98725",
"url": "https://bugzilla.suse.com/1286731"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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"details": "moderate"
}
],
"title": "CVE-2026-98725"
}
]
}