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CVE

CVE-2025-39964

crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg
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CVE

CVE-2025-39964

crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg

In the Linux kernel, the following vulnerability has been resolved:

crypto: afalg - Disallow concurrent writes in afalg_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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.8
-
3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://cert-portal.siemens.com/productcert/html/ssa-019113.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

Severity

7.8

CVSS Score
0
10

Basic Information

Base CVSS
7.8
EPSS Probability
0.0079%
EPSS Percentile
0.54718%
Introduced Version
8ff590903d5fc7f5a0a988c38267a3d08e6393a2,2.6.38,5.11.0,5.16.0,6.2.0,6.7.0,6.13.0,0
Fix Available
1b34cbbf4f011a121ef7b2d7d6e6920a036d5285,5.10.245,5.15.194,6.1.154,6.6.108,6.12.49,6.16.9,6.1.158-1,6.12.57-1,4.15.0-245.257,4.15.0-1187.200,5.4.0-1153.163~18.04.1,4.15.0-1195.210,5.4.0-1156.163~18.04.1,4.15.0-1180.197,5.4.0-1156.165~18.04.1,5.4.0-224.244~18.04.1,5.4.0-1099.104~18.04.1,4.15.0-1169.174,4.15.0-1149.160,5.4.0-1151.161~18.04.1,5.4.0-1136.149~18.04.1,5.4.0-224.244,5.4.0-1153.163,5.15.0-1098.105~20.04.1,5.4.0-1156.163,5.15.0-1102.111~20.04.1,5.4.0-1112.119,5.4.0-1156.165,5.15.0-1098.107~20.04.1,5.15.0-164.174~20.04.1,5.4.0-1099.104,5.15.0-1092.95~20.04.1,5.15.0-1093.99~20.04.1,5.4.0-1057.60,5.4.0-1140.149,5.15.0-1050.50~20.04.1,5.4.0-1151.161,5.15.0-1095.101~20.04.1,5.4.0-1136.149,5.15.0-1093.97~20.04.2,5.4.0-1071.75,6.8.0-90.91,6.8.0-1044.46,6.14.0-1018.18~24.04.1,6.8.0-1044.50,6.14.0-1017.17~24.04.1,6.8.0-1029.32,6.8.0-1045.48,6.8.0-1041.46,6.8.0-1028.31,6.8.0-1042.42,6.8.0-90.91.1,6.8.0-1044.47,6.8.0-1044.47.1,6.8.0-1020.20,6.14.0-1017.17,6.8.0-1041.42,6.8.0-1044.48,6.14.0-37.37.1~24.04.1,6.8.0-1021.22,5.15.0-164.174,5.15.0-1098.105,6.8.0-1044.46~22.04.1,5.15.0-1102.111,6.8.0-1044.50~22.04.1,5.15.0-1098.107,6.8.0-1045.48~22.04.1,5.15.0-1094.100,5.15.0-1081.89,6.8.0-90.91~22.04.1,5.15.0-1092.95,6.8.0-1042.42~22.04.1,5.15.0-1093.99,5.15.0-1090.95,6.8.0-90.91.1~22.04.1,5.15.0-1093.94,6.8.0-1044.47~22.04.1,5.15.0-1050.50,5.15.0-1039.39,5.15.0-1095.101,6.8.0-1041.42~22.04.1,5.15.0-1062.66,0:5.15.0-314.193.5.3.el9uek,0:5.15.0-315.196.5.1.el9uek,0:6.12.0-104.43.4.3.el9uek,0:5.15.0-313.189.5.2.el9uek,0:5.4.17-2136.352.5.el7uek,0:5.4.17-2136.351.3.2.el7uek,0:6.12.0-104.43.4.3.el10uek,0:5.15.0-314.193.5.3.el8uek,0:5.4.17-2136.352.5.el8uek,0:5.4.17-2136.351.3.2.el8uek,0:5.15.0-315.196.5.1.el8uek,0:5.15.0-313.189.5.2.el8uek,0:5.10.245-241.976.amzn2,0:1.0-0.amzn2,0:5.15.194-135.217.amzn2,1:6.1.155-176.282.amzn2023,1:1.0-0.amzn2023,1:6.12.53-69.119.amzn2023,6.12.76-r0,6.18.17-r0,6.18.48-r0,7.2.3-r0,6.18.44-r0,20260609-r0,20260911-r0

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