CVE-2026-7322

Name	CVE-2026-7322
Description	Memory safety bugs present in Firefox ESR 115.35.0, Firefox ESR 140.10.0, Thunderbird ESR 140.10.0, Firefox 150.0.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, and Firefox ESR 115.35.1.
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
firefox (PTS)	sid	150.0-1	vulnerable
firefox-esr (PTS)	bullseye	115.14.0esr-1~deb11u1	vulnerable
	bullseye (security)	140.10.0esr-1~deb11u1	vulnerable
	bookworm	128.14.0esr-1~deb12u1	vulnerable
	bookworm (security)	140.10.0esr-1~deb12u1	vulnerable
	trixie	140.8.0esr-1~deb13u1	vulnerable
	trixie (security)	140.10.0esr-1~deb13u1	vulnerable
	forky, sid	140.10.0esr-1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
firefox	source	(unstable)	(unfixed)
firefox-esr	source	(unstable)	(unfixed)

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2026-35/#CVE-2026-7322
https://www.mozilla.org/en-US/security/advisories/mfsa2026-36/#CVE-2026-7322