CVEvulnerability
CVE-2021-29981
8.8 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-08-17
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P
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.
Affected configurations
• mozilla firefox (< 91.0)
• mozilla thunderbird (< 91.0)
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1707774 Issue Tracking, Vendor Advisory
- https://security.gentoo.org/glsa/202202-03 Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-33/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-36/ Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1707774 Issue Tracking, Vendor Advisory
- https://security.gentoo.org/glsa/202202-03 Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-33/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-36/ Vendor Advisory