CVE-2021-43539
Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing those live pointers. This could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
- Affected products
- Alt Linux, Almalinux, Astra Linux, Centos, Firefox, Firefox Esr, Linuxmint, Red Hat
- Mozilla Firefox
- < 95.0
- Mozilla Firefox Esr
- < 91.4.0
- Mozilla Thunderbird
- < 91.4.0
- Fix
- Available
- CVSS 3.1
- 8.8 HIGH
- EPSS
- 1.6% (74th percentile)
- Weakness
- CWE-416
- NVD status
- Modified
- Published
- 2021-12-08
CVE-2021-43539 at NVD
No indexed exploits for CVE-2021-43539 yet
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No exploit for CVE-2021-43539 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.