High severity8.8NVD Advisory· Published Nov 3, 2021· Updated Jun 17, 2026
CVE-2021-38500
CVE-2021-38500
Description
Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1. 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 < 78.15, Thunderbird < 91.2, Firefox ESR < 91.2, Firefox ESR < 78.15, and Firefox < 93.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
57<93+ 2 more
- (no CPE)range: <93
- (no CPE)range: unspecified
- (no CPE)range: unspecified
<78.15, <91.2+ 1 more
- (no CPE)range: <78.15, <91.2
- (no CPE)range: unspecified
- osv-coords52 versionspkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaFirefox-branding-SLE&distro=openSUSE%20Leap%2015.3pkg: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/rust-cbindgen&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/rust-cbindgen&distro=openSUSE%20Leap%2015.3pkg:rpm/suse/MozillaFirefox-branding-SLED&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSSpkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Enterprise%20Storage%206pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOSpkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSSpkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP2pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP3pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCLpkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSSpkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1pkg: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%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
< 128.5.1-1.1+ 51 more
- (no CPE)range: < 128.5.1-1.1
- (no CPE)range: < 91-9.5.1
- (no CPE)range: < 91.2.0-lp152.2.67.1
- (no CPE)range: < 91.2.0-8.54.1
- (no CPE)range: < 93.0-1.1
- (no CPE)range: < 91.4.0-lp152.2.52.1
- (no CPE)range: < 91.4.0-8.45.2
- (no CPE)range: < 91.2.0-1.1
- (no CPE)range: < 0.19.0-lp152.2.7.1
- (no CPE)range: < 0.19.0-1.9.1
- (no CPE)range: < 91-21.18.1
- (no CPE)range: < 91-4.19.1
- (no CPE)range: < 91-4.19.1
- (no CPE)range: < 91-4.19.1
- (no CPE)range: < 91-4.19.1
- (no CPE)range: < 91-4.19.1
- (no CPE)range: < 91-9.5.1
- (no CPE)range: < 91-9.5.1
- (no CPE)range: < 91-4.19.1
- (no CPE)range: < 91-4.19.1
- (no CPE)range: < 91-4.19.1
- (no CPE)range: < 91-4.19.1
- (no CPE)range: < 91-4.19.1
- (no CPE)range: < 91.2.0-112.74.1
- (no CPE)range: < 91.2.0-3.155.2
- (no CPE)range: < 91.2.0-3.155.2
- (no CPE)range: < 91.2.0-3.155.2
- (no CPE)range: < 91.2.0-3.155.2
- (no CPE)range: < 91.2.0-3.155.2
- (no CPE)range: < 91.2.0-8.54.1
- (no CPE)range: < 91.2.0-8.54.1
- (no CPE)range: < 91.2.0-78.143.1
- (no CPE)range: < 91.2.0-112.74.1
- (no CPE)range: < 91.2.0-112.74.1
- (no CPE)range: < 91.2.0-112.74.1
- (no CPE)range: < 91.2.0-112.74.1
- (no CPE)range: < 91.2.0-112.74.1
- (no CPE)range: < 91.2.0-3.155.2
- (no CPE)range: < 91.2.0-3.155.2
- (no CPE)range: < 91.2.0-3.155.2
- (no CPE)range: < 91.2.0-112.74.1
- (no CPE)range: < 91.2.0-112.74.1
- (no CPE)range: < 91.2.0-112.74.1
- (no CPE)range: < 91.2.0-3.155.2
- (no CPE)range: < 91.2.0-3.155.2
- (no CPE)range: < 91.2.0-112.74.1
- (no CPE)range: < 91.2.0-112.74.1
- (no CPE)range: < 91.2.0-112.74.1
- (no CPE)range: < 91.2.0-112.74.1
- (no CPE)range: < 91.2.0-112.74.1
- (no CPE)range: < 91.4.0-8.45.2
- (no CPE)range: < 91.4.0-8.45.2
Patches
Vulnerability mechanics
References
8- lists.debian.org/debian-lts-announce/2022/01/msg00001.htmlnvdMailing ListThird Party Advisory
- www.debian.org/security/2022/dsa-5034nvdIssue TrackingThird Party Advisory
- www.mozilla.org/security/advisories/mfsa2021-43/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2021-44/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2021-45/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2021-46/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2021-47/nvdVendor Advisory
- bugzilla.mozilla.org/buglist.cginvdBroken LinkIssue Tracking
News mentions
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