cve-2025-39964
CVSS 7.8 osv_linux
Description
In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg Issuing two writes to the same af_alg socket is bogus as the data will be interleaved in an unpredictable fashion. Furthermore, concurrent writes may create inconsistencies in the internal socket state. Disallow this by adding a new ctx->write field that indiciates exclusive ownership for writing.
Timeline
- Published
- unknown
- Last Modified
- unknown
CVSS Details
CVSS details not available.
Affected Products
No product information available.
References
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
- https://git.kernel.org/stable/c/0f28c4adbc4a97437874c9b669fd7958a8c6d6ce
- https://git.kernel.org/stable/c/1b34cbbf4f011a121ef7b2d7d6e6920a036d5285
- https://git.kernel.org/stable/c/1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8
- https://git.kernel.org/stable/c/45bcf60fe49b37daab1acee57b27211ad1574042
- https://git.kernel.org/stable/c/7c4491b5644e3a3708f3dbd7591be0a570135b84
- https://git.kernel.org/stable/c/9aee87da5572b3a14075f501752e209801160d3d
- https://git.kernel.org/stable/c/e4c1ec11132ec466f7362a95f36a506ce4dc08c9
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-39964
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39964.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-39964
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Linked Vulnerabilities
{
"affected": [
{
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-39964.json"
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"ranges": [
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{
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{
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{
"fixed": "1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8"
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{
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},
{
"fixed": "9aee87da5572b3a14075f501752e209801160d3d"
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{
"fixed": "45bcf60fe49b37daab1acee57b27211ad1574042"
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{
"fixed": "1b34cbbf4f011a121ef7b2d7d6e6920a036d5285"
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT"
}
]
},
{
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-39964.json"
},
"package": {
"ecosystem": "Linux",
"name": "Kernel"
},
"ranges": [
{
"events": [
{
"introduced": "2.6.38"
},
{
"fixed": "5.10.245"
}
],
"type": "ECOSYSTEM"
},
{
"events": [
{
"introduced": "5.11.0"
},
{
"fixed": "5.15.194"
}
],
"type": "ECOSYSTEM"
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{
"events": [
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"introduced": "5.16.0"
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{
"fixed": "6.1.154"
}
],
"type": "ECOSYSTEM"
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{
"events": [
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"introduced": "6.2.0"
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{
"fixed": "6.6.108"
}
],
"type": "ECOSYSTEM"
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{
"events": [
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"introduced": "6.7.0"
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{
"fixed": "6.12.49"
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],
"type": "ECOSYSTEM"
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{
"events": [
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"introduced": "6.13.0"
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{
"fixed": "6.16.9"
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"type": "ECOSYSTEM"
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],
"database_specific": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39964.json"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: af_alg - Disallow concurrent writes in af_alg_sendmsg\n\nIssuing two writes to the same af_alg socket is bogus as the\ndata will be interleaved in an unpredictable fashion. Furthermore,\nconcurrent writes may create inconsistencies in the internal\nsocket state.\n\nDisallow this by adding a new ctx->write field that indiciates\nexclusive ownership for writing.",
"id": "CVE-2025-39964",
"modified": "2026-10-28T02:30:30.630733932Z",
"published": "2025-10-13T13:48:30.334Z",
"references": [
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0f28c4adbc4a97437874c9b669fd7958a8c6d6ce"
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"url": "https://git.kernel.org/stable/c/1b34cbbf4f011a121ef7b2d7d6e6920a036d5285"
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"url": "https://git.kernel.org/stable/c/1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8"
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"url": "https://git.kernel.org/stable/c/45bcf60fe49b37daab1acee57b27211ad1574042"
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"url": "https://git.kernel.org/stable/c/7c4491b5644e3a3708f3dbd7591be0a570135b84"
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{
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"url": "https://git.kernel.org/stable/c/9aee87da5572b3a14075f501752e209801160d3d"
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{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e4c1ec11132ec466f7362a95f36a506ce4dc08c9"
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{
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"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-39964"
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{
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"url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39964.json"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39964"
},
{
"type": "PACKAGE",
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
}
],
"related": [
"ALSA-2026:70402",
"ALSA-2026:70403",
"ALSA-2026:70459",
"ALSA-2026:70498",
"SUSE-SU-2026:0962-1",
"SUSE-SU-2026:1041-1",
"SUSE-SU-2026:1078-1",
"SUSE-SU-2026:1081-1",
"SUSE-SU-2026:20667-1",
"SUSE-SU-2026:20720-1",
"SUSE-SU-2026:20838-1",
"SUSE-SU-2026:20845-1",
"SUSE-SU-2026:20873-1",
"SUSE-SU-2026:20876-1",
"SUSE-SU-2026:20931-1",
"SUSE-SU-2026:21284-1",
"SUSE-SU-2026:23066-1",
"SUSE-SU-2026:23068-1",
"SUSE-SU-2026:23221-1",
"SUSE-SU-2026:23231-1",
"SUSE-SU-2026:23237-1",
"SUSE-SU-2026:23477-1",
"SUSE-SU-2026:23481-1",
"SUSE-SU-2026:23528-1",
"SUSE-SU-2026:23529-1",
"SUSE-SU-2026:4120-1",
"SUSE-SU-2026:4282-1",
"SUSE-SU-2026:4665-1",
"SUSE-SU-2026:4666-1",
"SUSE-SU-2026:4667-1",
"SUSE-SU-2026:4668-1",
"openSUSE-SU-2026:20416-1",
"openSUSE-SU-2026:21555-1"
],
"schema_version": "1.9.2",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg"
}
Enrichment data
Aggregated bundle (all enrichments)