CVE-2026-92024

Name	CVE-2026-92024
Description	Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
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	DLA-4781-1, DLA-4782-1, DSA-6501-1, DSA-6503-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
firefox (PTS)	sid	156.0-1	fixed
firefox-esr (PTS)	bookworm	140.12.0esr-1~deb12u1	vulnerable
	bookworm (security)	140.16.0esr-1~deb12u1	fixed
	trixie	140.15.0esr-1~deb13u1	vulnerable
	trixie (security)	140.16.0esr-1~deb13u1	fixed
	forky	140.15.0esr-1	vulnerable
	sid	140.16.0esr-1	fixed
thunderbird (PTS)	bookworm	1:140.12.0esr-1~deb12u1	vulnerable
	bookworm (security)	1:140.16.0esr-1~deb12u1	fixed
	trixie	1:140.12.0esr-1~deb13u1	vulnerable
	trixie (security)	1:140.16.0esr-1~deb13u1	fixed
	forky	1:140.14.0esr-1	vulnerable
	sid	1:153.3.0esr-1	fixed

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

Package	Type	Release	Fixed Version	Origin
firefox	source	(unstable)	156.0-1
firefox-esr	source	bookworm	140.16.0esr-1~deb12u1	DLA-4781-1
firefox-esr	source	trixie	140.16.0esr-1~deb13u1	DSA-6501-1
firefox-esr	source	(unstable)	140.16.0esr-1
thunderbird	source	bookworm	1:140.16.0esr-1~deb12u1	DLA-4782-1
thunderbird	source	trixie	1:140.16.0esr-1~deb13u1	DSA-6503-1
thunderbird	source	(unstable)	1:153.3.0esr-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2026-90/#CVE-2026-92024
https://www.mozilla.org/en-US/security/advisories/mfsa2026-92/#CVE-2026-92024
https://www.mozilla.org/en-US/security/advisories/mfsa2026-96/#CVE-2026-92024