CVE-2021-29981

HighCVSS 8.8/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected software

No affected versions have been published.

Timeline

Published: Aug 17, 2021
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

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