CVE-2021-23981

Name	CVE-2021-23981
Description	A texture upload of a Pixel Buffer Object could have confused the WebGL code to skip binding the buffer used to unpack it, resulting in memory corruption and a potentially exploitable information leak or crash. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-2607-1, DLA-2609-1, DSA-4874-1, DSA-4876-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
firefox (PTS)	sid	125.0.1-2	fixed
firefox-esr (PTS)	buster	91.12.0esr-1~deb10u1	fixed
	buster (security)	115.9.1esr-1~deb10u1	fixed
	bullseye	115.7.0esr-1~deb11u1	fixed
	bullseye (security)	115.10.0esr-1~deb11u1	fixed
	bookworm	115.7.0esr-1~deb12u1	fixed
	bookworm (security)	115.10.0esr-1~deb12u1	fixed
	trixie	115.8.0esr-1	fixed
	sid	115.10.0esr-1	fixed
thunderbird (PTS)	buster	1:91.12.0-1~deb10u1	fixed
	buster (security)	1:115.9.0-1~deb10u1	fixed
	bullseye	1:115.7.0-1~deb11u1	fixed
	bullseye (security)	1:115.9.0-1~deb11u1	fixed
	bookworm	1:115.7.0-1~deb12u1	fixed
	bookworm (security)	1:115.9.0-1~deb12u1	fixed
	sid	1:115.9.0-1	fixed

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

Package	Type	Release	Fixed Version	Origin
firefox	source	(unstable)	87.0-1
firefox-esr	source	stretch	78.9.0esr-1~deb9u1	DLA-2607-1
firefox-esr	source	buster	78.9.0esr-1~deb10u1	DSA-4874-1
firefox-esr	source	(unstable)	78.9.0esr-1
thunderbird	source	stretch	1:78.9.0-1~deb9u1	DLA-2609-1
thunderbird	source	buster	1:78.9.0-1~deb10u1	DSA-4876-1
thunderbird	source	(unstable)	1:78.9.0-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2021-10/#CVE-2021-23981
https://www.mozilla.org/en-US/security/advisories/mfsa2021-11/#CVE-2021-23981
https://www.mozilla.org/en-US/security/advisories/mfsa2021-12/#CVE-2021-23981