CVE-2021-29981

high

Description

An issue present in lowering/register allocation could have led to obscure but deterministic register confusion failures in JITted code that would lead to a potentially exploitable crash. This vulnerability affects Firefox < 91 and Thunderbird < 91.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1707774

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

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

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

Details

Source: MITRE

Published: 2021-08-17

Updated: 2022-03-16

Risk Information

CVSS v2

Base Score: 6.8

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

Impact Score: 6.4

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 8.8

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

Impact Score: 5.9

Exploitability Score: 2.8

Severity: HIGH