CVE-2026-45130

Name	CVE-2026-45130
Description	Vim is an open source, command line text editor. Prior to version 9.2.0450, a heap buffer overflow exists in read_compound() in src/spellfile.c when loading a crafted spell file (.spl) with UTF-8 encoding active. An attacker-controlled length field in the spell file's compound section overflows a 32-bit signed integer multiplication, causing a small buffer to be allocated for a write loop that runs many iterations, overflowing the heap. Because the 'spelllang' option can be set from a modeline, a text file modeline can trigger spell file loading if a malicious .spl file has been planted on the runtimepath. This issue has been patched in version 9.2.0450.
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	1136097

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
vim (PTS)	bullseye	2:8.2.2434-3+deb11u1	vulnerable
	bullseye (security)	2:8.2.2434-3+deb11u3	vulnerable
	bookworm	2:9.0.1378-2+deb12u2	vulnerable
	trixie	2:9.1.1230-2	vulnerable
	forky	2:9.2.0355-1	vulnerable
	sid	2:9.2.0428-1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
vim	source	(unstable)	(unfixed)			1136097

Notes

https://github.com/vim/vim/security/advisories/GHSA-q4jv-r9gj-6cwv
Fixed by: https://github.com/vim/vim/commit/92993329178cb1f72d700fff45ca86e1c2d369f8 (v9.2.0450)