{ "cvss": 5.5, "datePublished": "2026-04-22T14:16:50.940", "dateUpdated": "2026-11-05T22:18:36.687", "description": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_key: validate families in pfkey_send_migrate()\n\nsyzbot was able to trigger a crash in skb_put() [1]\n\nIssue is that pfkey_send_migrate() does not check old/new families,\nand that set_ipsecrequest() @family argument was truncated,\nthus possibly overfilling the skb.\n\nValidate families early, do not wait set_ipsecrequest().\n\n[1]\n\nskbuff: skb_over_panic: text:ffffffff8a752120 len:392 put:16 head:ffff88802a4ad040 data:ffff88802a4ad040 tail:0x188 end:0x180 dev:\n kernel BUG at net/core/skbuff.c:214 !\nCall Trace:\n \n skb_over_panic net/core/skbuff.c:219 [inline]\n skb_put+0x159/0x210 net/core/skbuff.c:2655\n skb_put_zero include/linux/skbuff.h:2788 [inline]\n set_ipsecrequest net/key/af_key.c:3532 [inline]\n pfkey_send_migrate+0x1270/0x2e50 net/key/af_key.c:3636\n km_migrate+0x155/0x260 net/xfrm/xfrm_state.c:2848\n xfrm_migrate+0x2140/0x2450 net/xfrm/xfrm_policy.c:4705\n xfrm_do_migrate+0x8ff/0xaa0 net/xfrm/xfrm_user.c:3150", "id": "CVE-2026-31515", "raw": { "affected": [ { "affectedData": [ { "defaultStatus": "unaffected", "product": "Linux", "programFiles": [ "net/key/af_key.c" ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [ { "lessThan": "d0c5aa8dd38887714f1aad04236a3620b56a5e4e", "status": "affected", "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece", "versionType": "git" }, { "lessThan": "e06b596fc4eb01936a2e5dccad17c946d660bab8", "status": "affected", "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece", "versionType": "git" }, { "lessThan": "8ddf8de7e758f6888988467af9ffc8adf589fb16", "status": "affected", "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece", "versionType": "git" }, { "lessThan": "d3225e6b9bd51ec177970a628fe4b11237ce87d5", "status": "affected", "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece", "versionType": "git" }, { "lessThan": "7b18692c59afb8e5c364c8e3ac01e51dd6b52028", "status": "affected", "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece", "versionType": "git" }, { "lessThan": "83f644ea92987c100b82d8481ae2230faeed3d34", "status": "affected", "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece", "versionType": "git" }, { "lessThan": "ee836e820a40e2ca4da8af7310bff92d586772d4", "status": "affected", "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece", "versionType": "git" }, { "lessThan": "eb2d16a7d599dc9d4df391b5e660df9949963786", "status": "affected", "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece", "versionType": "git" } ] }, { "defaultStatus": "affected", "product": "Linux", "programFiles": [ "net/key/af_key.c" ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [ { "status": "affected", "version": "2.6.21" }, { "lessThan": "2.6.21", "status": "unaffected", "version": "0", "versionType": "semver" }, { "lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.253", "versionType": "semver" }, { "lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.203", "versionType": "semver" }, { "lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.168", "versionType": "semver" }, { "lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.131", "versionType": "semver" }, { "lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.80", "versionType": "semver" }, { "lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.21", "versionType": "semver" }, { "lessThanOrEqual": "6.19.*", "status": "unaffected", "version": "6.19.11", "versionType": "semver" }, { "lessThanOrEqual": "*", "status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix" } ] } ], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67" }, { "affectedData": [ { "defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "vendor": "Siemens", "versions": [ { "lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom" } ] }, { "defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "vendor": "Siemens", "versions": [ { "lessThan": "*", "status": "affected", "version": "V3.1.5", "versionType": "custom" } ] }, { "defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "vendor": "Siemens", "versions": [ { "lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom" } ] }, { "defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "vendor": "Siemens", "versions": [ { "lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom" } ] }, { "defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "vendor": "Siemens", "versions": [ { "lessThan": "*", "status": "affected", "version": "V3.1.5", "versionType": "custom" } ] }, { "defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "vendor": "Siemens", "versions": [ { "lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom" } ] }, { "defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "vendor": "Siemens", "versions": [ { "lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom" } ] }, { "defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "vendor": "Siemens", "versions": [ { "lessThan": "*", "status": "affected", "version": "V3.1.5", "versionType": "custom" } ] }, { "defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "vendor": "Siemens", "versions": [ { "lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom" } ] }, { "defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "vendor": "Siemens", "versions": [ { "lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom" } ] }, { "defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "vendor": "Siemens", "versions": [ { "lessThan": "*", "status": "affected", "version": "V3.1.5", "versionType": "custom" } ] }, { "defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "vendor": "Siemens", "versions": [ { "lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom" } ] }, { "defaultStatus": "unknown", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP", "vendor": "Siemens", "versions": [ { "lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom" } ] }, { "defaultStatus": "unknown", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP", "vendor": "Siemens", "versions": [ { "lessThan": "*", "status": "affected", "version": "V3.1.5", "versionType": "custom" } ] }, { "defaultStatus": "unknown", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP", "vendor": "Siemens", "versions": [ { "lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom" } ] } ], "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e" } ], "configurations": [ { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "36EBE72B-44B5-4850-AE2E-90E94D179AE3", "versionEndExcluding": "5.10.253", "versionStartIncluding": "2.6.21.1", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "20DDB3E9-AABF-4107-ADB0-5362AA067045", "versionEndExcluding": "5.15.203", "versionStartIncluding": "5.11", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E2DDDCA1-6DAB-4018-B920-8F045DDD8D3B", "versionEndExcluding": "6.1.168", "versionStartIncluding": "5.16", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "CE6ED4D4-0046-4573-BFA9-D64143B6A89F", "versionEndExcluding": "6.6.131", "versionStartIncluding": "6.2", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "97EB19EC-A11E-49C6-9D2F-6F6EC6CB98B6", "versionEndExcluding": "6.12.80", "versionStartIncluding": "6.7", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "ED39847A-3B46-4729-B7CA-B2C30B9FA8FE", "versionEndExcluding": "6.18.21", "versionStartIncluding": "6.13", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4CA2E747-A9EC-4518-9AA2-B4247FC748B7", "versionEndExcluding": "6.19.11", "versionStartIncluding": "6.19", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.21:-:*:*:*:*:*:*", "matchCriteriaId": "A509AAC2-C059-4798-8B5E-AC4313926FD9", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*", "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138", "vulnerable": true } ], "negate": false, "operator": "OR" } ] } ], "cveTags": [], "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_key: validate families in pfkey_send_migrate()\n\nsyzbot was able to trigger a crash in skb_put() [1]\n\nIssue is that pfkey_send_migrate() does not check old/new families,\nand that set_ipsecrequest() @family argument was truncated,\nthus possibly overfilling the skb.\n\nValidate families early, do not wait set_ipsecrequest().\n\n[1]\n\nskbuff: skb_over_panic: text:ffffffff8a752120 len:392 put:16 head:ffff88802a4ad040 data:ffff88802a4ad040 tail:0x188 end:0x180 dev:\n kernel BUG at net/core/skbuff.c:214 !\nCall Trace:\n \n skb_over_panic net/core/skbuff.c:219 [inline]\n skb_put+0x159/0x210 net/core/skbuff.c:2655\n skb_put_zero include/linux/skbuff.h:2788 [inline]\n set_ipsecrequest net/key/af_key.c:3532 [inline]\n pfkey_send_migrate+0x1270/0x2e50 net/key/af_key.c:3636\n km_migrate+0x155/0x260 net/xfrm/xfrm_state.c:2848\n xfrm_migrate+0x2140/0x2450 net/xfrm/xfrm_policy.c:4705\n xfrm_do_migrate+0x8ff/0xaa0 net/xfrm/xfrm_user.c:3150" } ], "id": "CVE-2026-31515", "lastModified": "2026-11-05T22:18:36.687", "metrics": { "cvssMetricV31": [ { "cvssData": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1" }, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary" } ], "ssvcV203": [ { "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": { "id": "CVE-2026-31515", "options": [ { "exploitation": "none" }, { "automatable": "no" }, { "technicalImpact": "partial" } ], "role": "CISA Coordinator", "timestamp": "2026-11-05T21:36:29.210869Z", "version": "2.0.3" } } ] }, "published": "2026-04-22T14:16:50.940", "references": [ { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/7b18692c59afb8e5c364c8e3ac01e51dd6b52028" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/83f644ea92987c100b82d8481ae2230faeed3d34" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/8ddf8de7e758f6888988467af9ffc8adf589fb16" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/d0c5aa8dd38887714f1aad04236a3620b56a5e4e" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/d3225e6b9bd51ec177970a628fe4b11237ce87d5" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/e06b596fc4eb01936a2e5dccad17c946d660bab8" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/eb2d16a7d599dc9d4df391b5e660df9949963786" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/ee836e820a40e2ca4da8af7310bff92d586772d4" }, { "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html" }, { "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html" }, { "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html" } ], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [ { "description": [ { "lang": "en", "value": "CWE-476" } ], "source": "nvd@nist.gov", "type": "Primary" } ] }, "severity": "MEDIUM", "source": "nvd", "title": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_key: validate families in pfkey_send_migrate(..." }