PT-2025-40627 · Linux+4 · Linux Kernel+4
Published
2025-09-18
·
Updated
2026-05-07
·
CVE-2025-39931
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
An issue exists in the Linux kernel's crypto/af alg component where a crash can occur if an error interrupts the
af alg sendmsg function. Specifically, if an error causes the function to abort, the ctx->merge variable may contain an invalid value from a previous loop iteration. This can lead to a crash when af alg sendmsg attempts an invalid merge operation on a subsequent entry. The fix involves setting ctx->merge to zero early in the loop to prevent this condition.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Improper Resource Release
Use of Uninitialized Resource
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Related Identifiers
Affected Products
Debian
Linuxmint
Linux Kernel
Suse
Ubuntu