CVE-2026-31618

Name	CVE-2026-31618
Description	In the Linux kernel, the following vulnerability has been resolved: fbdev: tdfxfb: avoid divide-by-zero on FBIOPUT_VSCREENINFO Much like commit 19f953e74356 ("fbdev: fb_pm2fb: Avoid potential divide by zero error"), we also need to prevent that same crash from happening in the udlfb driver as it uses pixclock directly when dividing, which will 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)
References	DSA-6238-1

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)	5.10.251-5	vulnerable
	bookworm	6.1.159-1	vulnerable
	bookworm (security)	6.1.172-1	vulnerable
	trixie	6.12.73-1	vulnerable
	trixie (security)	6.12.88-1	fixed
	forky	7.0.4-1	fixed
	sid	7.0.7-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
linux	source	trixie	6.12.85-1		DSA-6238-1
linux	source	(unstable)	6.19.14-1

https://git.kernel.org/linus/8f98b81fe011e1879e6a7b1247e69e06a5e17af2 (7.1-rc1)