CVE-2021-29981

CVE-2021-29981: vulnerability in Mozilla Firefox

Published 17 Aug 2021 · Updated 03 Aug 2024

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3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 1.0%

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 products

Mozilla · Firefox Mozilla · Thunderbird

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In the same product, most dangerous first.

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References

https://bugzilla.mozilla.org/show_bug.cgi?id=1707774 https://security.gentoo.org/glsa/202202-03 https://www.mozilla.org/security/advisories/mfsa2021-33/https://www.mozilla.org/security/advisories/mfsa2021-36/