High severity8.8NVD Advisory· Published Feb 16, 2026· Updated Apr 13, 2026
CVE-2026-2447
CVE-2026-2447
Description
Heap buffer overflow in libvpx. This vulnerability was fixed in Firefox 147.0.4, Firefox ESR 140.7.1, Firefox ESR 115.32.1, Thunderbird 140.7.2, and Thunderbird 147.0.2.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
38cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*+ 3 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <147.0.4
- cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*range: <115.32.1
- (no CPE)range: <140.7.1
- (no CPE)range: <147.0.4
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*range: <140.7.2
- (no CPE)range: <140.7.2
- osv-coords32 versionspkg:apk/chainguard/firefoxpkg:apk/chainguard/firefox-esrpkg:apk/wolfi/firefoxpkg:rpm/almalinux/firefoxpkg:rpm/almalinux/firefox-x11pkg:rpm/almalinux/libvpxpkg:rpm/almalinux/libvpx-develpkg:rpm/almalinux/thunderbirdpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg: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%20High%20Performance%20Computing%2015%20SP5-ESPOSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP7pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP5-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP5pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP7pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP7
< 148.0-r0+ 31 more
- (no CPE)range: < 148.0-r0
- (no CPE)range: < 140.8.0-r0
- (no CPE)range: < 148.0-r0
- (no CPE)range: < 140.8.0-2.el8_10.alma.1
- (no CPE)range: < 140.8.0-2.el9_7.alma.1
- (no CPE)range: < 1.7.0-13.el8_10
- (no CPE)range: < 1.7.0-13.el8_10
- (no CPE)range: < 140.8.0-1.el8_10.alma.1
- (no CPE)range: < 140.7.1-1.1
- (no CPE)range: < 140.7.1-150200.152.219.1
- (no CPE)range: < 140.7.1-160000.1.1
- (no CPE)range: < 147.0.4-1.1
- (no CPE)range: < 140.7.2-150200.8.257.1
- (no CPE)range: < 140.8.1-bp160.1.1
- (no CPE)range: < 140.7.2-1.1
- (no CPE)range: < 140.7.1-150200.152.219.1
- (no CPE)range: < 140.7.1-150200.152.219.1
- (no CPE)range: < 140.7.1-150200.152.219.1
- (no CPE)range: < 140.7.1-150200.152.219.1
- (no CPE)range: < 140.7.1-150200.152.219.1
- (no CPE)range: < 140.7.1-112.298.1
- (no CPE)range: < 140.7.1-150200.152.219.1
- (no CPE)range: < 140.7.1-150200.152.219.1
- (no CPE)range: < 140.7.1-150200.152.219.1
- (no CPE)range: < 140.7.1-160000.1.1
- (no CPE)range: < 140.7.1-150200.152.219.1
- (no CPE)range: < 140.7.1-150200.152.219.1
- (no CPE)range: < 140.7.1-150200.152.219.1
- (no CPE)range: < 140.7.1-160000.1.1
- (no CPE)range: < 140.7.1-112.298.1
- (no CPE)range: < 140.7.2-150200.8.257.1
- (no CPE)range: < 140.7.2-150200.8.257.1
Patches
Vulnerability mechanics
References
4- www.mozilla.org/security/advisories/mfsa2026-10/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-11/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdIssue TrackingPermissions Required
- lists.debian.org/debian-lts-announce/2026/02/msg00028.htmlnvd
News mentions
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