IM
IronMonkey Threat Research

CVE-2025-39931 HIGH

Published: 2025-10-04 | Last Modified: 2026-07-30 | Status: Modified

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't be done. Fix this by setting ctx->merge to zero near the start of the loop.

CVSS Metrics

Base Score: 5.5 (MEDIUM)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack VectorLOCAL
Attack ComplexityLOW
Privileges RequiredLOW
User InteractionNONE
ScopeUNCHANGED
Confidentiality ImpactNONE
Integrity ImpactNONE
Availability ImpactHIGH

Source: [email protected]

Type: Primary

Exploitability Score: 1.8

Impact Score: 3.6

Weaknesses

Source Type Description
[email protected] Primary
en CWE-908

Affected Products

Vendor Product Version Update Type
linux linux_kernel * <built-in method update of dict object at 0x7d24246ec4c0> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7d23a65fcb80> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7d23a65fd3c0> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7d24246ef980> Operating System
linux linux_kernel 6.17 <built-in method update of dict object at 0x7d24246ef440> Operating System
linux linux_kernel 6.17 <built-in method update of dict object at 0x7d24246ee640> Operating System
linux linux_kernel 6.17 <built-in method update of dict object at 0x7d23bea6d6c0> Operating System
linux linux_kernel 6.17 <built-in method update of dict object at 0x7d23a65ff300> Operating System
linux linux_kernel 6.17 <built-in method update of dict object at 0x7d24246effc0> Operating System
linux linux_kernel 6.17 <built-in method update of dict object at 0x7d24246eee40> Operating System

Affected Configurations

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:6.17:rc6:*:*:*:*:*:*

References

Notification
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