Critical 9.8Published Oct 15, 2025

CVE-2025-39975smb: client: fix wrong index reference in smb2_compound_op()

Updated under an hour ago (Oct 28, 2026, 10:00 AM ET)

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Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Deferred
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 5ddcc9e92d54548219985ce4de88618fb53e14ec before ba7bcfd52c66dd1c2dfa5142aca7e4a70b62dfa5; from efe8db3ecaa40a8520dc9a54283dcecd82ceea9c before bfb1e2aad1fecef8320fd71332acde0d53a8d699; from 3681c74d342db75b0d641ba60de27bf73e16e66b before 093615fc76063ea08d454ba86677ce64c736e806; from 3681c74d342db75b0d641ba60de27bf73e16e66b before fbe2dc6a9c7318f7263f5e4d50f6272b931c5756; 77aefd1d9b790f60634adebbdcfffbe934f41c34; from 6.6.75 before 6.6.109; from 6.12.12 before 6.12.50; from 6.13.1 before 6.14	CNA record

References

References

https://git.kernel.org/stable/c/ba7bcfd52c66dd1c2dfa5142aca7e4a70b62dfa5
https://git.kernel.org/stable/c/bfb1e2aad1fecef8320fd71332acde0d53a8d699
https://git.kernel.org/stable/c/093615fc76063ea08d454ba86677ce64c736e806
https://git.kernel.org/stable/c/fbe2dc6a9c7318f7263f5e4d50f6272b931c5756

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.