CVE-2022-31740

8.8 highEPSS 0.7%

High (8.8) in mozilla. EPSS 0.7% chance of exploitation in the next 30 days.

On arm64, WASM code could have resulted in incorrect assembly generation leading to a register allocation problem, and a potentially exploitable crash. This vulnerability affects Thunderbird < 91.10, Firefox < 101, and Firefox ESR < 91.10.

Severity

CVSS 3.1

8.8 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 52% of CVEs (scores of 2026-10-31)
CWE: CWE-119
Published: 2022-12-22
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mozilla:firefox
mozilla:firefox_esr
mozilla:thunderbird

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1766806
https://www.mozilla.org/security/advisories/mfsa2022-20/
https://www.mozilla.org/security/advisories/mfsa2022-21/
https://www.mozilla.org/security/advisories/mfsa2022-22/
https://bugzilla.mozilla.org/show_bug.cgi?id=1766806

Check your stack JSON