CVE-2024-42250

Name	CVE-2024-42250
Description	In the Linux kernel, the following vulnerability has been resolved: cachefiles: add missing lock protection when polling Add missing lock protection in poll routine when iterating xarray, otherwise: Even with RCU read lock held, only the slot of the radix tree is ensured to be pinned there, while the data structure (e.g. struct cachefiles_req) stored in the slot has no such guarantee. The poll routine will iterate the radix tree and dereference cachefiles_req accordingly. Thus RCU read lock is not adequate in this case and spinlock is needed here.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-4008-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	bullseye	5.10.223-1	fixed
	bullseye (security)	5.10.237-1	fixed
	bookworm	6.1.137-1	fixed
	bookworm (security)	6.1.140-1	fixed
	trixie	6.12.27-1	fixed
	sid	6.12.29-1	fixed
linux-6.1 (PTS)	bullseye (security)	6.1.137-1~deb11u1	fixed

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

Package	Type	Release	Fixed Version	Origin
linux	source	bullseye	(not affected)
linux	source	bookworm	6.1.106-1
linux	source	(unstable)	6.9.10-1
linux-6.1	source	bullseye	6.1.119-1~deb11u1	DLA-4008-1

[bullseye] - linux <not-affected> (Vulnerable code not present)
https://git.kernel.org/linus/cf5bb09e742a9cf6349127e868329a8f69b7a014 (6.10)