CVE-2025-39931

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

04/10/2025

Last modified:

25/03/2026

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Set merge to zero early in af_alg_sendmsg If an error causes af_alg_sendmsg to abort, ctx->merge may contain a garbage value from the previous loop. This may then trigger a crash on the next entry into af_alg_sendmsg when it attempts to do a merge that can&#39;t be done. Fix this by setting ctx->merge to zero near the start of the loop.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	2.6.38 (including)	6.1.154 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.108 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.12.49 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.13 (including)	6.16.9 (excluding)
cpe:2.3:o:linux:linux_kernel:6.17:rc1::::::
cpe:2.3:o:linux:linux_kernel:6.17:rc2::::::
cpe:2.3:o:linux:linux_kernel:6.17:rc3::::::
cpe:2.3:o:linux:linux_kernel:6.17:rc4::::::
cpe:2.3:o:linux:linux_kernel:6.17:rc5::::::
cpe:2.3:o:linux:linux_kernel:6.17:rc6::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2025-39931

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools