CVE ID:	CVE-2021-29981
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.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2021-29981 https://security.gentoo.org/glsa/202202-03 https://bugzilla.mozilla.org/show_bug.cgi?id=1707774 https://bugzilla.mozilla.org/show_bug.cgi?id=1707774 https://www.mozilla.org/security/advisories/mfsa2021-33/ https://www.mozilla.org/security/advisories/mfsa2021-33/ https://www.mozilla.org/security/advisories/mfsa2021-36/ https://www.mozilla.org/security/advisories/mfsa2021-36/