DEBIAN-CVE-2025-39964

Advisory lineage Upstream: 1 Downstream: 2
Upstream
CVE-2025-39964
Published: 13 Oct 2025, 14:15
Last modified:28 Apr 2026, 20:30

Vulnerability Summary

Overall Risk (default)
low
13/100
CVSS Score
3.3 LOW
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

13 Oct 2025, 14:15
Published
Vulnerability first disclosed
28 Apr 2026, 20:30
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

Affected Systems

  • debian•linux

    < 5.10.247-1 | < 6.1.158-1 | < 6.12.57-1 | < 6.16.9-1

  • debian•linux-6.1

    < 6.1.158-1~deb11u1

References (1)