High severity8.8NVD Advisory· Published Dec 19, 2023· Updated Jun 17, 2026
CVE-2023-6856
CVE-2023-6856
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
44cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*+ 4 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*range: <121.0
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*range: <115.6
- (no CPE)range: <115.6
- (no CPE)range: unspecified
- (no CPE)range: unspecified
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*range: <115.6
- (no CPE)range: <115.6
- (no CPE)range: unspecified
- osv-coords33 versionspkg:apk/chainguard/firefox-esrpkg:rpm/almalinux/firefoxpkg:rpm/almalinux/firefox-x11pkg:rpm/almalinux/thunderbirdpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2015.4pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2015.5pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2015.5pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweedpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-ESPOSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP5pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2015%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP5pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP5
< 121.0-r0+ 32 more
- (no CPE)range: < 121.0-r0
- (no CPE)range: < 115.6.0-1.el8_9.alma
- (no CPE)range: < 115.6.0-1.el9_3.alma
- (no CPE)range: < 115.6.0-1.el9_3.alma
- (no CPE)range: < 115.6.0-150200.152.120.1
- (no CPE)range: < 115.6.0-150200.152.120.1
- (no CPE)range: < 121.0-1.1
- (no CPE)range: < 115.6.0-150200.8.142.2
- (no CPE)range: < 115.6.0-1.1
- (no CPE)range: < 128.5.1-1.1
- (no CPE)range: < 115.6.0-150200.152.120.1
- (no CPE)range: < 115.6.0-150000.150.119.1
- (no CPE)range: < 115.6.0-150200.152.120.1
- (no CPE)range: < 115.6.0-150200.152.120.1
- (no CPE)range: < 115.6.0-150200.152.120.1
- (no CPE)range: < 115.6.0-150200.152.120.1
- (no CPE)range: < 115.6.0-150200.152.120.1
- (no CPE)range: < 115.6.0-150200.152.120.1
- (no CPE)range: < 115.6.0-150200.152.120.1
- (no CPE)range: < 115.6.0-150200.152.120.1
- (no CPE)range: < 115.6.0-112.194.1
- (no CPE)range: < 115.6.0-150000.150.119.1
- (no CPE)range: < 115.6.0-150200.152.120.1
- (no CPE)range: < 115.6.0-150200.152.120.1
- (no CPE)range: < 115.6.0-150200.152.120.1
- (no CPE)range: < 115.6.0-112.194.1
- (no CPE)range: < 115.6.0-150000.150.119.1
- (no CPE)range: < 115.6.0-150200.152.120.1
- (no CPE)range: < 115.6.0-150200.152.120.1
- (no CPE)range: < 115.6.0-150200.152.120.1
- (no CPE)range: < 115.6.0-112.194.1
- (no CPE)range: < 115.6.0-150200.8.142.2
- (no CPE)range: < 115.6.0-150200.8.142.2
Patches
Vulnerability mechanics
References
9- lists.debian.org/debian-lts-announce/2023/12/msg00020.htmlnvdMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2023/12/msg00021.htmlnvdMailing ListThird Party Advisory
- security.gentoo.org/glsa/202401-10nvdThird Party Advisory
- www.debian.org/security/2023/dsa-5581nvdThird Party Advisory
- www.debian.org/security/2023/dsa-5582nvdThird Party Advisory
- www.mozilla.org/security/advisories/mfsa2023-54/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2023-55/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2023-56/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdIssue TrackingPermissions Required
News mentions
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