CVE-2023-6856

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.

• CWE-787

• https://bugzilla.mozilla.org/show_bug.cgi?id=1843782Issue Tracking, Permissions Required
• https://lists.debian.org/debian-lts-announce/2023/12/msg00020.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2023/12/msg00021.htmlMailing List, Third Party Advisory
• https://security.gentoo.org/glsa/202401-10Third Party Advisory
• https://www.debian.org/security/2023/dsa-5581Third Party Advisory
• https://www.debian.org/security/2023/dsa-5582Third Party Advisory
• https://www.mozilla.org/security/advisories/mfsa2023-54/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2023-55/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2023-56/Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=1843782Issue Tracking, Permissions Required
• https://lists.debian.org/debian-lts-announce/2023/12/msg00020.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2023/12/msg00021.htmlMailing List, Third Party Advisory
• https://security.gentoo.org/glsa/202401-10Third Party Advisory
• https://www.debian.org/security/2023/dsa-5581Third Party Advisory
• https://www.debian.org/security/2023/dsa-5582Third Party Advisory
• https://www.mozilla.org/security/advisories/mfsa2023-54/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2023-55/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2023-56/Vendor Advisory

Published

Dec 19, 2023

Last Modified

Jun 17, 2026

Status

Modified

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