CVE-2021-29945
6.5
MEDIUM
CVSS 3.1
EPSS 0.37%
Description
The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and result in a crash. *Note: This issue only affected x86-32 platforms. Other platforms are unaffected.*. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
How to fix CVE-2021-29945
To remediate CVE-2021-29945, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 78.10.0esr-1 or later
- —upgrade to 1:78.10.0-1 or later
Is CVE-2021-29945 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 78.10.0esr-1
- from 0, < 1:78.10.0-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |