CVE-2021-43535
- Source
- https://cve.org/CVERecord?id=CVE-2021-43535
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-43535.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-43535
- Downstream
- Related
- Published
- 2021-12-08T22:15:09Z
- Modified
- 2026-02-04T15:58:51.619185Z
- Severity
-
- 8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
-
- https://bugzilla.mozilla.org/show_bug.cgi?id=1667102
- https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html
- https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html
- https://www.debian.org/security/2021/dsa-5026
- https://www.debian.org/security/2022/dsa-5034
- https://www.mozilla.org/security/advisories/mfsa2021-43/
- https://www.mozilla.org/security/advisories/mfsa2021-49/
- https://www.mozilla.org/security/advisories/mfsa2021-50/
- https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html
- https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html
- https://bugzilla.mozilla.org/show_bug.cgi?id=1667102
- https://www.debian.org/security/2022/dsa-5034