vulnerability

Red Hat: CVE-2021-43539: GC rooting failure when calling wasm instance methods (Multiple Advisories)

Name: Red Hat: CVE-2021-43539: GC rooting failure when calling wasm instance methods (Multiple Advisories)
Creator: Red Hat
Published: 2021-12-08T00:00:00.000Z
Keywords: CVE, CWE-416, Red Hat, 2021, 43539, GC rooting failure when calling wasm instance methods (Multiple Advisories), redhat-upgrade-firefox, redhat-upgrade-firefox-debuginfo, redhat-upgrade-firefox-debugsource, redhat-upgrade-thunderbird, redhat-upgrade-thunderbird-debuginfo, redhat-upgrade-thunderbird-debugsource, Severity 7

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Severity

CVSS

(AV:N/AC:M/Au:N/C:P/I:P/A:P)

Published

Dec 8, 2021

Added

Dec 9, 2021

Modified

Mar 27, 2026

Description

Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing those live pointers. This could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

Solutions

redhat-upgrade-firefoxredhat-upgrade-firefox-debuginforedhat-upgrade-firefox-debugsourceredhat-upgrade-thunderbirdredhat-upgrade-thunderbird-debuginforedhat-upgrade-thunderbird-debugsource

References

Rapid7 Labs

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