CVE-2026-23221

Name	CVE-2026-23221
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-6162-1, DSA-6163-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	bullseye	5.10.223-1	vulnerable
	bullseye (security)	5.10.249-1	vulnerable
	bookworm	6.1.159-1	vulnerable
	bookworm (security)	6.1.164-1	fixed
	trixie	6.12.63-1	vulnerable
	trixie (security)	6.12.74-2	fixed
	forky	6.19.6-1	fixed
	sid	6.19.6-2	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin
linux	source	bookworm	6.1.164-1	DSA-6163-1
linux	source	trixie	6.12.74-2	DSA-6162-1
linux	source	(unstable)	6.18.12-1

https://git.kernel.org/linus/148891e95014b5dc5878acefa57f1940c281c431 (7.0-rc1)