VDB
DEBIAN-CVE-2021-43535
DEBIAN-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.
Risk Scores
CVSS 3.1
8.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | firefox-esr | 0, 0, 0 |
| Debian:14 | thunderbird | 0, 0, 0 |
| Debian:12 | thunderbird | 0, 0, 0 |
| Debian:13 | firefox-esr | 0, 0, 0 |
| Debian:11 | firefox-esr | 78.15.0, 78.15.0, 91.0.1 |
| Debian:14 | firefox-esr | 0, 0, 0 |
| Debian:13 | thunderbird | 0, 0, 0 |
| Debian:11 | thunderbird | 1:91.4.1-1~deb10u1, 1:91.4.1-1~deb9u1, * |
Timeline
- Dec 8, 2021 CVE Published
- Apr 28, 2026 CVE Updated