CVE-2024-57940

Name	CVE-2024-57940
Description	In the Linux kernel, the following vulnerability has been resolved: exfat: fix the infinite loop in exfat_readdir() If the file system is corrupted so that a cluster is linked to itself in the cluster chain, and there is an unused directory entry in the cluster, 'dentry' will not be incremented, causing condition 'dentry < max_dentries' unable to prevent an infinite loop. This infinite loop causes s_lock not to be released, and other tasks will hang, such as exfat_sync_fs(). This commit stops traversing the cluster chain when there is unused directory entry in the cluster to avoid this infinite loop.
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-4075-1, DLA-4076-1, DSA-5860-1

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)	5.10.234-1	fixed
	bookworm	6.1.129-1	fixed
	bookworm (security)	6.1.128-1	fixed
	trixie	6.12.20-1	fixed
	sid	6.12.21-1	fixed
linux-6.1 (PTS)	bullseye (security)	6.1.129-1~deb11u1	fixed

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

Package	Type	Release	Fixed Version	Origin
linux	source	bullseye	5.10.234-1	DLA-4075-1
linux	source	bookworm	6.1.128-1	DSA-5860-1
linux	source	(unstable)	6.12.10-1
linux-6.1	source	bullseye	6.1.128-1~deb11u1	DLA-4076-1

https://git.kernel.org/linus/fee873761bd978d077d8c55334b4966ac4cb7b59 (6.13-rc7)