CVE-2021-29980
High
CVE-2021-29980
Uninitialized memory in a canvas object could have caused an incorrect free() leading to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.
Exploit probability
1.4%
Published
August 17, 2021
Required by
Not available
Last source change
April 16, 2026
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Open Source Vulnerabilities
CVE-2021-29980
View original source
Uninitialized memory in a canvas object could have caused an incorrect free() leading to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.
05 / REFERENCES
Further evidence
- https://bugzilla.mozilla.org/show_bug.cgi?id=1722204
- https://security.gentoo.org/glsa/202202-03
- https://security.gentoo.org/glsa/202208-14
- 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/