CVE-2021-43535 PUBLISHED CVSS 8.800000190734863 HIGH

A use-after-free could have occured when an HTTP2 session object was released on a different thread, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 93, Thunderbird < 91.3, and Firefox ESR < 91.3.

EPSS 1.63% · 81.8th percentile

Risk Scores

CVSS v3.1
8.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score
1.63%
81.8th percentile

Affected Products

VendorProductVersions
mozillafirefox_esr0
MozillaFirefox ESRunspecified
mozillafirefox0
MozillaThunderbirdunspecified
MozillaFirefoxunspecified
mozillathunderbird0
debiandebian_linux9.0, 10.0, 11.0

Timeline

References

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