High severity8.8NVD Advisory· Published Jun 24, 2021· Updated Jun 17, 2026
CVE-2021-29967
CVE-2021-29967
Description
Mozilla developers reported memory safety bugs present in Firefox 88 and Firefox ESR 78.11. 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 affects Thunderbird < 78.11, Firefox < 89, and Firefox ESR < 78.11.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
47cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*+ 4 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*range: <89.0
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*range: <78.11
- (no CPE)range: <89
- (no CPE)range: unspecified
- (no CPE)range: unspecified
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*range: <78.11
- (no CPE)range: <78.11
- (no CPE)range: unspecified
- osv-coords39 versionspkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2015.3pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2015.3pkg: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%20Module%20for%20Desktop%20Applications%2015%20SP3pkg: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%20SP2pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP3
< 78.11.0-lp152.2.58.1+ 38 more
- (no CPE)range: < 78.11.0-lp152.2.58.1
- (no CPE)range: < 78.11.0-8.43.1
- (no CPE)range: < 92.0-1.2
- (no CPE)range: < 78.11.0-lp152.2.45.1
- (no CPE)range: < 78.11.0-8.30.1
- (no CPE)range: < 91.1.1-1.1
- (no CPE)range: < 128.5.1-1.1
- (no CPE)range: < 78.11.0-112.62.1
- (no CPE)range: < 78.11.0-3.144.1
- (no CPE)range: < 78.11.0-3.144.1
- (no CPE)range: < 78.11.0-3.144.1
- (no CPE)range: < 78.11.0-3.144.1
- (no CPE)range: < 78.11.0-3.144.1
- (no CPE)range: < 78.11.0-8.43.1
- (no CPE)range: < 78.11.0-8.43.1
- (no CPE)range: < 78.11.0-78.131.1
- (no CPE)range: < 78.11.0-112.62.1
- (no CPE)range: < 78.11.0-112.62.1
- (no CPE)range: < 78.11.0-112.62.1
- (no CPE)range: < 78.11.0-112.62.1
- (no CPE)range: < 78.11.0-112.62.1
- (no CPE)range: < 78.11.0-3.144.1
- (no CPE)range: < 78.11.0-3.144.1
- (no CPE)range: < 78.11.0-3.144.1
- (no CPE)range: < 78.11.0-112.62.1
- (no CPE)range: < 78.11.0-112.62.1
- (no CPE)range: < 78.11.0-112.62.1
- (no CPE)range: < 78.11.0-3.144.1
- (no CPE)range: < 78.11.0-3.144.1
- (no CPE)range: < 78.11.0-112.62.1
- (no CPE)range: < 78.11.0-3.144.1
- (no CPE)range: < 78.11.0-3.144.1
- (no CPE)range: < 78.11.0-3.144.1
- (no CPE)range: < 78.11.0-112.62.1
- (no CPE)range: < 78.11.0-112.62.1
- (no CPE)range: < 78.11.0-112.62.1
- (no CPE)range: < 78.11.0-112.62.1
- (no CPE)range: < 78.11.0-8.30.1
- (no CPE)range: < 78.11.0-8.30.1
Patches
Vulnerability mechanics
References
5- bugzilla.mozilla.org/buglist.cginvdIssue TrackingNot ApplicableThird Party Advisory
- security.gentoo.org/glsa/202208-14nvdThird Party Advisory
- www.mozilla.org/security/advisories/mfsa2021-23/nvdRelease NotesVendor Advisory
- www.mozilla.org/security/advisories/mfsa2021-24/nvdRelease NotesVendor Advisory
- www.mozilla.org/security/advisories/mfsa2021-26/nvdRelease NotesVendor Advisory
News mentions
0No linked articles in our index yet.