CVE-2025-54771

Name	CVE-2025-54771
Description	A use-after-free vulnerability has been identified in the GNU GRUB (Grand Unified Bootloader). The flaw occurs because the file-closing process incorrectly retains a memory pointer, leaving an invalid reference to a file system structure. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible data integrity or confidentiality compromise is not discarded.
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)
Debian Bugs	1120968

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
grub2 (PTS)	bullseye (security), bullseye	2.06-3~deb11u6	vulnerable
	bookworm, bookworm (security)	2.06-13+deb12u1	vulnerable
	forky, trixie	2.12-9	vulnerable
	sid	2.14~git20250718.0e36779-2	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
grub2	source	(unstable)	(unfixed)			1120968

https://gitweb.git.savannah.gnu.org/gitweb/?p=grub.git;a=commit;h=c4fb4cbc941981894a00ba8e75d634a41967a27f