CVE-2025-39975

CRITICALCVSS 9.8/10EPSS 0.19%

Last modified

CVE-2025-39975 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 0.19% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
9.8/10

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

EPSS Probability
0.19%

8.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 5ddcc9e92d54548219985ce4de88618fb53e14ec, < ba7bcfd52c66dd1c2dfa5142aca7e4a70b62dfa5; >= efe8db3ecaa40a8520dc9a54283dcecd82ceea9c, < bfb1e2aad1fecef8320fd71332acde0d53a8d699; >= 3681c74d342db75b0d641ba60de27bf73e16e66b, < 093615fc76063ea08d454ba86677ce64c736e806; >= 3681c74d342db75b0d641ba60de27bf73e16e66b, < fbe2dc6a9c7318f7263f5e4d50f6272b931c5756; 77aefd1d9b790f60634adebbdcfffbe934f41c34; >= 6.6.75, < 6.6.109; >= 6.12.12, < 6.12.50; >= 6.13.1, < 6.14
LinuxLinux6.14

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2025-39975?
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.
How severe is CVE-2025-39975?
CVE-2025-39975 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.19% probability of exploitation in the next 30 days.
How do I fix CVE-2025-39975?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST