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CVE-2023-6856

Date: December 19, 2023

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.

Language: C++

Severity Score

8.8

Related Resources (12)

Url: https://www.mozilla.org/security/advisories/mfsa2023-56/

Url: https://www.debian.org/security/2023/dsa-5581

Url: https://nvd.nist.gov/vuln/detail/CVE-2023-6856

Url: https://lists.debian.org/debian-lts-announce/2023/12/msg00021.html

Url: https://security-tracker.debian.org/tracker/CVE-2023-6856

Url: https://www.debian.org/security/2023/dsa-5582

Url: https://lists.debian.org/debian-lts-announce/2023/12/msg00020.html

Url: https://bugzilla.mozilla.org/show_bug.cgi?id=1843782

Url: https://security.gentoo.org/glsa/202401-10

Url: https://www.mozilla.org/security/advisories/mfsa2023-55/

Url: https://www.mozilla.org/security/advisories/mfsa2023-54/

Url: https://www.mend.io/vulnerability-database/CVE-2023-6856

Severity Score

8.8

Weakness Type (CWE)

Out-of-bounds Write

CWE-787

CVSS v3.1

Base Score:	8.8
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	REQUIRED
Scope (S):	UNCHANGED
Confidentiality (C):	HIGH
Integrity (I):	HIGH
Availability (A):	HIGH

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CVE-2023-6856

Date: December 19, 2023

Language: C++

Severity Score

Related Resources (12)

Severity Score

Weakness Type (CWE)

CVSS v3.1

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