CVE-2026-23221: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.1% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: bus: fsl-mc: fix use-after-free in driver_override_show() The driver_override_show() function reads the driver_override string without holding the device_lock. However, driver_override_store() uses driver_set_override(), which modifies and frees the string while holding the device_lock. This can result in a concurrent use-after-free if the string is freed by the store function while being read by the show function. Fix this by holding the device_lock around the read operation.

Affected products

• Linux Linux Kernel: from 5.10, before 5.15.201 (fixed in 5.15.201); from 5.16, before 6.1.164 (fixed in 6.1.164); from 6.2, before 6.6.127 (fixed in 6.6.127); from 6.7, before 6.12.74 (fixed in 6.12.74); from 6.13, before 6.18.11 (fixed in 6.18.11); from 6.19, before 6.19.1 (fixed in 6.19.1)

Published 2026-02-18. Last modified 2026-06-17.