High severity8.8NVD Advisory· Published Jun 24, 2021· Updated Jun 17, 2026
CVE-2021-29966
CVE-2021-29966
Description
Mozilla developers reported memory safety bugs present in Firefox 88. 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 Firefox < 89.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
5<89+ 2 more
- (no CPE)range: <89
- (no CPE)range: unspecified
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*range: >=78.11.0,<89.0
- osv-coords2 versionspkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweed
< 128.5.1-1.1+ 1 more
- (no CPE)range: < 128.5.1-1.1
- (no CPE)range: < 92.0-1.2
Patches
Vulnerability mechanics
References
3- security.gentoo.org/glsa/202107-09nvdThird Party Advisory
- www.mozilla.org/security/advisories/mfsa2021-23/nvdRelease NotesVendor Advisory
- bugzilla.mozilla.org/buglist.cginvdBroken LinkIssue Tracking
News mentions
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