CVE-2023-6856
HIGH8.8EPSS 10.5%firefox-esr - security update
Published: 12/19/2023Modified: 4/28/2026
Description
The WebGL `DrawElementsInstanced` method was susceptible to a heap buffer overflow when used on systems with the Mesa VM driver. This issue could allow an attacker to perform remote code execution and sandbox escape. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.
Affected packages (4)
- Debian/firefox-esrfrom 0, < 115.6.0esr-1~deb11u1
- Debian/firefox-esrfrom 0, < 115.6.0esr-1~deb10u1
- Debian/firefox-esrfrom 0, < 115.6.0esr-1~deb11u1
- Debian/thunderbirdfrom 0, < 1:115.6.0-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |