CVE-2021-29982

medium

Description

Due to incorrect JIT optimization, we incorrectly interpreted data from the wrong type of object, resulting in the potential leak of a single bit of memory. This vulnerability affects Firefox < 91 and Thunderbird < 91.

References

https://www.mozilla.org/security/advisories/mfsa2021-36/

https://www.mozilla.org/security/advisories/mfsa2021-33/

https://security.gentoo.org/glsa/202202-03

https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-16441

https://bugzilla.mozilla.org/show_bug.cgi?id=1715318

Details

Source: Mitre, NVD

Published: 2021-08-17

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 6.5

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