CVE-2025-61661

Name	CVE-2025-61661
Description	A vulnerability has been identified in the GRUB (Grand Unified Bootloader) component. This flaw occurs because the bootloader mishandles string conversion when reading information from a USB device, allowing an attacker to exploit inconsistent length values. A local attacker can connect a maliciously configured USB device during the boot sequence to trigger this issue. A successful exploitation may lead GRUB to crash, leading to a Denial of Service. Data corruption may be also possible, although given the complexity of the exploit the impact is most likely limited.
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=549a9cc372fd0b96a4ccdfad0e12140476cc62a3