CVE-2025-39964

Advisory lineage Upstream: 0 Downstream: 50
Analyzed
Published: 13 Oct 2025, 13:48
Last modified:11 May 2026, 21:39

Vulnerability Summary

Overall Risk (default)
low
13/100
CVSS Score
3.3 LOW
v3.1 (nvd)
EPSS Score
0.03% LOW
0% probability -0.02%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

13 Oct 2025, 13:48
Published
Vulnerability first disclosed
11 May 2026, 21:39
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•LOW•Score: 3.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

EPSS Trends

Current EPSS score: 0.03%• Percentile: 9%

Affected Systems

  • linux•linux

    ≥ 8ff590903d5fc7f5a0a988c38267a3d08e6393a2, < 0f28c4adbc4a97437874c9b669fd7958a8c6d6ce | ≥ 8ff590903d5fc7f5a0a988c38267a3d08e6393a2, < e4c1ec11132ec466f7362a95f36a506ce4dc08c9 | ≥ 8ff590903d5fc7f5a0a988c38267a3d08e6393a2, < 1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8 | ≥ 8ff590903d5fc7f5a0a988c38267a3d08e6393a2, < 7c4491b5644e3a3708f3dbd7591be0a570135b84 | ≥ 8ff590903d5fc7f5a0a988c38267a3d08e6393a2, < 9aee87da5572b3a14075f501752e209801160d3d | ≥ 8ff590903d5fc7f5a0a988c38267a3d08e6393a2, < 45bcf60fe49b37daab1acee57b27211ad1574042 | ≥ 8ff590903d5fc7f5a0a988c38267a3d08e6393a2, < 1b34cbbf4f011a121ef7b2d7d6e6920a036d5285 | 2.6.38

  • linux•linux_kernel

    ≥ 2.6.38, < 5.10.245 | ≥ 5.11, < 5.15.194 | ≥ 5.16, < 6.1.154 | ≥ 6.2, < 6.6.108 | ≥ 6.7, < 6.12.49 | ≥ 6.13, < 6.16.9 | 6.17:rc1 | 6.17:rc2 | 6.17:rc3 | 6.17:rc4 | 6.17:rc5 | 6.17:rc6

References (7)