Published: 17/08/2021 Updated: 16/03/2022

CVSS v2 Base Score: 6.8 | Impact Score: 6.4 | Exploitability Score: 8.6

CVSS v3 Base Score: 8.8 | Impact Score: 5.9 | Exploitability Score: 2.8

VMScore: 605

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

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.

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Mozilla Foundation Security Advisory 2021-33 Security Vulnerabilities fixed in Firefox 91 Announced August 10, 2021 Impact high Products Firefox Fixed in Firefox 91 ...

Mozilla Foundation Security Advisory 2021-36 Security Vulnerabilities fixed in Thunderbird 91 Announced August 11, 2021 Impact high Products Thunderbird Fixed in Thunderbird 91 ...

A security issue has been found in Firefox before version 91 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 ...

NVD-CWE-noinfo 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 https://nvd.nist.gov https://www.mozilla.org/en-US/security/advisories/mfsa2021-33/https://security.archlinux.org/CVE-2021-29981

CVE-2021-29981

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