What is CVE-2025-39975?

CVE-2025-39975 is a critical-severity vulnerability in Linux. CVSS score: 9.8/10. Published 2025-10-15.

How severe is CVE-2025-39975?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Linux

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.

EPSS: 0.002 (8.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 6.14, 6.13.1, 3681c74d342db75b0d641ba60de27bf73e16e66b

References

Frequently asked questions

What is CVE-2025-39975?: CVE-2025-39975 is a critical-severity vulnerability in Linux. CVSS score: 9.8/10. Published 2025-10-15.
How severe is CVE-2025-39975?: Critical severity. CVSS v3 base score is 9.8 out of 10.