CVE-2026-63954

Name	CVE-2026-63954
Description	In the Linux kernel, the following vulnerability has been resolved: hpfs: fix a crash if hpfs_map_dnode_bitmap fails If hpfs_map_dnode_bitmap fails, the code would call hpfs_brelse4 on uninitialized quad buffer head, causing a crash.
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)

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)	5.10.262-1	fixed
	bookworm	6.1.176-1	fixed
	bookworm (security)	6.1.180-1	fixed
	trixie	6.12.94-1	fixed
	trixie (security)	6.12.101-1	fixed
	forky, sid	7.1.7-1	fixed

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

Package	Type	Release	Fixed Version
linux	source	bullseye	5.10.259-1
linux	source	bookworm	6.1.176-1
linux	source	trixie	6.12.94-1
linux	source	(unstable)	7.0.12-1

https://git.kernel.org/linus/974820a59efde7c1a7e1260bcfe9bb81f833cc9f (7.1-rc6)