DEBIAN-CVE-2025-40022

Advisory lineage Upstream: 1 Downstream: 2
Upstream
CVE-2025-40022
Published: 24 Oct 2025, 13:15
Last modified:15 Jun 2026, 18:48

Vulnerability Summary

Overall Risk (default)
minimal
0/100
CVSS Score
No data
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

24 Oct 2025, 13:15
Published
Vulnerability first disclosed
15 Jun 2026, 18:48
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Fix incorrect boolean values in af_alg_ctx Commit 1b34cbbf4f01 ("crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg") changed some fields from bool to 1-bit bitfields of type u32. However, some assignments to these fields, specifically 'more' and 'merge', assign values greater than 1. These relied on C's implicit conversion to bool, such that zero becomes false and nonzero becomes true. With a 1-bit bitfields of type u32 instead, mod 2 of the value is taken instead, resulting in 0 being assigned in some cases when 1 was intended. Fix this by restoring the bool type.

Affected Systems

  • debian•linux

    < 5.10.247-1 | < 6.1.158-1 | < 6.12.57-1 | < 6.16.10-1

  • debian•linux-6.1

    < 6.1.158-1~deb11u1

References (1)