CVE-2026-23364: Linux Kernel

High severity, CVSS 7.4. EPSS: 0.4% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Compare MACs in constant time To prevent timing attacks, MAC comparisons need to be constant-time. Replace the memcmp() with the correct function, crypto_memneq().

Affected products

• Linux Linux Kernel: from 5.15.1, before 6.1.167 (fixed in 6.1.167); from 6.2, before 6.6.130 (fixed in 6.6.130); from 6.7, before 6.12.78 (fixed in 6.12.78); from 6.13, before 6.18.19 (fixed in 6.18.19); from 6.19, before 6.19.7 (fixed in 6.19.7); version 5.15 only; …

Published 2026-03-25. Last modified 2026-06-19.