CVE-2021-43534
Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2. 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 < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
- Affected products
- Alt Linux, Astra Linux, Centos, Firefox, Firefox Esr, Linuxmint, Red Hat, Rocky Linux
- Mozilla Firefox
- < 94.0
- Mozilla Firefox Esr
- < 91.3.0
- Mozilla Thunderbird
- < 91.3.0
- Fix
- Available
- CVSS 3.1
- 8.8 HIGH
- EPSS
- 1.2% (65th percentile)
- Weakness
- CWE-787
- NVD status
- Modified
- Published
- 2021-12-08
CVE-2021-43534 at NVD
No indexed exploits for CVE-2021-43534 yet
Our index is partial: it proves presence, never absence
No exploit for CVE-2021-43534 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.