VDB
DEBIAN-CVE-2021-4129
DEBIAN-CVE-2021-4129
PUBLISHED
CVSS 9.800000190734863 CRITICAL
Mozilla developers and community members Julian Hector, Randell Jesup, Gabriele Svelto, Tyson Smith, Christian Holler, and Masayuki Nakano reported memory safety bugs present in Firefox 94. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 95, Firefox ESR < 91.4.0, and Thunderbird < 91.4.0.
Risk Scores
CVSS v3.1
9.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:11 | thunderbird | 1:78.14.0-1~deb9u1, 78.14.0-1, 78.14.0-1 |
| Debian:13 | firefox-esr | 0, 0, 0 |
| Debian:12 | thunderbird | 0, 0, 0 |
| Debian:13 | thunderbird | 0, 0, 0 |
| Debian:14 | thunderbird | 0, 0, 0 |
| Debian:14 | firefox-esr | 0, 0, 0 |
| Debian:11 | firefox-esr | 91.4.0esr-1, 91.4.1esr-1~deb9u1, * |
| Debian:12 | firefox-esr | 0, 0, 0 |
Timeline
- Dec 22, 2022 CVE Published
- Apr 28, 2026 CVE Updated