High severity8.1NVD Advisory· Published Apr 29, 2025· Updated Apr 13, 2026
CVE-2025-4091
CVE-2025-4091
Description
Memory safety bugs present in Firefox 137, Thunderbird 137, Firefox ESR 128.9, and Thunderbird 128.9. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Thunderbird 138, and Thunderbird 128.10.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
31cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*+ 3 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <138.0
- cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*range: <128.10
- (no CPE)range: <128.10
- (no CPE)range: <138
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*+ 2 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*range: <138.0
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*range: <128.10.0
- (no CPE)range: <138
- osv-coords24 versionspkg:apk/chainguard/firefoxpkg:apk/wolfi/firefoxpkg:rpm/almalinux/firefoxpkg:rpm/almalinux/firefox-x11pkg:rpm/almalinux/thunderbirdpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Enterprise%20Storage%207.1pkg: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%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%20SP6pkg: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%2015%20SP5-LTSSpkg: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%20Server%20for%20SAP%20Applications%2015%20SP5pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP6pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP6
< 128.10-r0+ 23 more
- (no CPE)range: < 128.10-r0
- (no CPE)range: < 128.10-r0
- (no CPE)range: < 128.10.0-1.el9_5.alma.1
- (no CPE)range: < 128.10.0-1.el9_5.alma.1
- (no CPE)range: < 128.10.0-1.el9_5.alma.1
- (no CPE)range: < 128.10.0-150200.152.179.1
- (no CPE)range: < 138.0-1.1
- (no CPE)range: < 128.10.0-150200.8.212.1
- (no CPE)range: < 128.10.0-1.1
- (no CPE)range: < 128.10.0-150200.152.179.1
- (no CPE)range: < 128.10.0-150200.152.179.1
- (no CPE)range: < 128.10.0-150200.152.179.1
- (no CPE)range: < 128.10.0-150200.152.179.1
- (no CPE)range: < 128.10.0-150200.152.179.1
- (no CPE)range: < 128.10.0-150200.152.179.1
- (no CPE)range: < 128.10.0-150200.152.179.1
- (no CPE)range: < 128.10.0-150200.152.179.1
- (no CPE)range: < 128.10.0-150200.152.179.1
- (no CPE)range: < 128.10.0-150200.152.179.1
- (no CPE)range: < 128.10.0-150200.152.179.1
- (no CPE)range: < 128.10.0-150200.152.179.1
- (no CPE)range: < 128.10.0-150200.152.179.1
- (no CPE)range: < 128.10.0-150200.8.212.1
- (no CPE)range: < 128.10.0-150200.8.212.1
Patches
Vulnerability mechanics
References
6- www.mozilla.org/security/advisories/mfsa2025-28/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-29/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-31/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-32/nvdVendor Advisory
- bugzilla.mozilla.org/buglist.cginvdBroken Link
- lists.debian.org/debian-lts-announce/2025/05/msg00024.htmlnvd
News mentions
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