CVE-2021-29985

A use-after-free vulnerability in media channels could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.

Affected

Mozilla · Thunderbird · Firefox ESR · Firefox

CVSS v3.1 NVD

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2.0 NVD

6.8 MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS

1.45% chance of exploitation in the next 30 days, 73rd percentile

Published

2021-08-17

Updated

2024-08-03

Proof-of-concept exploits (1)

• https://bugzilla.mozilla.org/show_bug.cgi?id=1722083

Security advisories

• https://www.mozilla.org/security/advisories/mfsa2021-33
• https://www.mozilla.org/security/advisories/mfsa2021-34
• https://www.mozilla.org/security/advisories/mfsa2021-35
• https://www.mozilla.org/security/advisories/mfsa2021-36
• https://security.gentoo.org/glsa/202202-03
• https://security.gentoo.org/glsa/202208-14

References

• CVE Record
• NVD entry