CVE-2023-6856
firefox-esr - security update
8.8
HIGH
CVSS 3.1
EPSS 10.5%
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.
How to fix CVE-2023-6856
To remediate CVE-2023-6856, upgrade the affected package to a fixed version below.
- —upgrade to 115.6.0esr-1~deb11u1 or later
- —upgrade to 115.6.0esr-1~deb10u1 or later
- —upgrade to 115.6.0esr-1~deb11u1 or later
- —upgrade to 1:115.6.0-1~deb11u1 or later
Is CVE-2023-6856 being exploited?
Moderate — EPSS is 10.5%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (4)
- from 0, < 115.6.0esr-1~deb11u1
- from 0, < 115.6.0esr-1~deb10u1
- from 0, < 115.6.0esr-1~deb11u1
- from 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 |