CVE-2025-39975

smb: client: fix wrong index reference in smb2_compound_op()

State: Published
Severity: 9.8 Critical
Published: Oct 15, 2025
Updated: Aug 5, 2026
Reserved: Apr 16, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix wrong index reference in smb2_compound_op()

In smb2_compound_op(), the loop that processes each command's response uses wrong indices when accessing response bufferes.

This incorrect indexing leads to improper handling of command results. Also, if incorrectly computed index is greather than or equal to MAX_COMPOUND, it can cause out-of-bounds accesses.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	5ddcc9e92d54548219985ce4de88618fb53e14ec to before ba7bcfd52c66dd1c2dfa5142aca7e4a70b62dfa5Affected efe8db3ecaa40a8520dc9a54283dcecd82ceea9c to before bfb1e2aad1fecef8320fd71332acde0d53a8d699Affected 3681c74d342db75b0d641ba60de27bf73e16e66b to before 093615fc76063ea08d454ba86677ce64c736e806Affected 3681c74d342db75b0d641ba60de27bf73e16e66b to before fbe2dc6a9c7318f7263f5e4d50f6272b931c5756Affected 77aefd1d9b790f60634adebbdcfffbe934f41c34Affected 6.6.75 to before 6.6.109Affected 6.12.12 to before 6.12.50Affected 6.13.1 to before 6.14Affected
LinuxLinux	6.14Affected before 6.14Not affected 6.6.109 through 6.6.Not affected 6.12.50 through 6.12.Not affected 6.16.10 through 6.16.*Not affected 6.17 and laterNot affected

Product

Versions

LinuxLinux

5ddcc9e92d54548219985ce4de88618fb53e14ec to before ba7bcfd52c66dd1c2dfa5142aca7e4a70b62dfa5Affected
efe8db3ecaa40a8520dc9a54283dcecd82ceea9c to before bfb1e2aad1fecef8320fd71332acde0d53a8d699Affected
3681c74d342db75b0d641ba60de27bf73e16e66b to before 093615fc76063ea08d454ba86677ce64c736e806Affected
3681c74d342db75b0d641ba60de27bf73e16e66b to before fbe2dc6a9c7318f7263f5e4d50f6272b931c5756Affected
77aefd1d9b790f60634adebbdcfffbe934f41c34Affected
6.6.75 to before 6.6.109Affected
6.12.12 to before 6.12.50Affected
6.13.1 to before 6.14Affected

LinuxLinux

6.14Affected
before 6.14Not affected
6.6.109 through 6.6.*Not affected
6.12.50 through 6.12.*Not affected
6.16.10 through 6.16.*Not affected
6.17 and laterNot affected

References

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