High severity8.8NVD Advisory· Published Jun 24, 2021· Updated Jun 17, 2026
CVE-2021-23994
CVE-2021-23994
Description
A WebGL framebuffer was not initialized early enough, resulting in memory corruption and an out of bound write. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
43cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*+ 4 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*range: <88.0
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*range: <78.10
- (no CPE)range: <78.10
- (no CPE)range: unspecified
- (no CPE)range: unspecified
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*range: <78.10
- (no CPE)range: <78.10
- (no CPE)range: unspecified
- osv-coords35 versionspkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweedpkg:rpm/suse/MozillaFirefox&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Enterprise%20Storage%206pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP2pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCLpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Manager%20Proxy%204.0pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.0pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Manager%20Server%204.0pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP2
< 78.10.0-lp152.2.55.1+ 34 more
- (no CPE)range: < 78.10.0-lp152.2.55.1
- (no CPE)range: < 92.0-1.2
- (no CPE)range: < 78.10.0-lp152.2.41.1
- (no CPE)range: < 91.1.1-1.1
- (no CPE)range: < 128.5.1-1.1
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-8.38.1
- (no CPE)range: < 78.10.0-78.126.1
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-8.23.1
Patches
Vulnerability mechanics
References
4- bugzilla.mozilla.org/show_bug.cginvdIssue TrackingPermissions RequiredVendor Advisory
- www.mozilla.org/security/advisories/mfsa2021-14/nvdRelease NotesVendor Advisory
- www.mozilla.org/security/advisories/mfsa2021-15/nvdRelease NotesVendor Advisory
- www.mozilla.org/security/advisories/mfsa2021-16/nvdRelease NotesVendor Advisory
News mentions
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