High severity · published Dec 19, 2023
CVE-2023-6856
The WebGL `DrawElementsInstanced` method was susceptible to a heap buffer overflow when used on systems with the Mesa VM driver
8.8
CVSS
20.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)20.6% · higher than 98% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 121.0 · source: NVD
DL
Debian Linux · Debian
10.0; 11.0; 12.0 · source: NVD
FE
Firefox Esr · Mozilla
before 115.6 · source: NVD
TH
Thunderbird · Mozilla
before 115.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-6856
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-6856
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1843782
Mailing List
https://lists.debian.org/debian-lts-announce/2023/12/msg00020.html
Mailing List
https://lists.debian.org/debian-lts-announce/2023/12/msg00021.html
Third Party Advisory
https://security.gentoo.org/glsa/202401-10
Third Party Advisory
https://www.debian.org/security/2023/dsa-5581
Third Party Advisory
https://www.debian.org/security/2023/dsa-5582
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