CVE-2025-6436

EUVD-2025-19098
Memory safety bugs present in Firefox 139 and Thunderbird 139. 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 140 and Thunderbird 140.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.1 HIGH
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 66%
Affected Products (NVD)
VendorProductVersion
mozillafirefox
𝑥
< 140.0
mozillathunderbird
𝑥
< 140.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
firefox
sid
151.0-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
firefox
jammy
not-affected
noble
not-affected
oracular
not-affected
plucky
not-affected
questing
not-affected
resolute
not-affected
thunderbird
jammy
Fixed 1:140.7.1+build1-0ubuntu0.22.04.1
released
noble
not-affected
oracular
not-affected
plucky
not-affected
questing
not-affected
resolute
not-affected
mozjs38
bionic
needs-triage
jammy
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
mozjs52
bionic
ignored
focal
ignored
jammy
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
mozjs68
focal
ignored
jammy
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
mozjs78
jammy
ignored
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
mozjs91
jammy
ignored
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
mozjs102
jammy
ignored
noble
ignored
oracular
dne
plucky
dne
questing
dne
resolute
dne
mozjs115
jammy
dne
noble
ignored
oracular
ignored
plucky
ignored
questing
dne
resolute
dne
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
MozillaFirefox
suse enterprise desktop 15 SP6
140.1.0-150200.152.193.1
fixed
suse enterprise desktop 15 SP7
140.1.0-150200.152.193.1
fixed
suse enterprise sap 15 SP6
140.1.0-150200.152.193.1
fixed
suse enterprise sap 15 SP7
140.1.0-150200.152.193.1
fixed
suse enterprise server 12 SP3
140.0-112.270.2
fixed
suse enterprise server 12 SP5
140.0-112.270.2
fixed
suse enterprise server 15 SP2
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP3
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP4
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP5
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP6
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP7
140.1.0-150200.152.193.1
fixed
MozillaFirefox-branding-SLE-140
suse enterprise desktop 15 SP6
150200.9.21.1
fixed
suse enterprise desktop 15 SP7
150200.9.21.1
fixed
suse enterprise sap 15 SP6
150200.9.21.1
fixed
suse enterprise sap 15 SP7
150200.9.21.1
fixed
suse enterprise server 12 SP3
35.19.5
fixed
suse enterprise server 12 SP5
35.19.5
fixed
suse enterprise server 15 SP2
150200.9.21.1
fixed
suse enterprise server 15 SP3
150200.9.21.1
fixed
suse enterprise server 15 SP4
150200.9.21.1
fixed
suse enterprise server 15 SP5
150200.9.21.1
fixed
suse enterprise server 15 SP6
150200.9.21.1
fixed
suse enterprise server 15 SP7
150200.9.21.1
fixed
MozillaFirefox-devel
suse enterprise desktop 15 SP6
140.1.0-150200.152.193.1
fixed
suse enterprise desktop 15 SP7
140.1.0-150200.152.193.1
fixed
suse enterprise sap 15 SP6
140.1.0-150200.152.193.1
fixed
suse enterprise sap 15 SP7
140.1.0-150200.152.193.1
fixed
suse enterprise server 12 SP3
140.0-112.270.2
fixed
suse enterprise server 12 SP5
140.0-112.270.2
fixed
suse enterprise server 15 SP2
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP3
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP4
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP5
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP6
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP7
140.1.0-150200.152.193.1
fixed
MozillaFirefox-translations-common
suse enterprise desktop 15 SP6
140.1.0-150200.152.193.1
fixed
suse enterprise desktop 15 SP7
140.1.0-150200.152.193.1
fixed
suse enterprise sap 15 SP6
140.1.0-150200.152.193.1
fixed
suse enterprise sap 15 SP7
140.1.0-150200.152.193.1
fixed
suse enterprise server 12 SP3
140.0-112.270.2
fixed
suse enterprise server 12 SP5
140.0-112.270.2
fixed
suse enterprise server 15 SP2
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP3
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP4
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP5
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP6
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP7
140.1.0-150200.152.193.1
fixed
MozillaFirefox-translations-other
suse enterprise desktop 15 SP6
140.1.0-150200.152.193.1
fixed
suse enterprise desktop 15 SP7
140.1.0-150200.152.193.1
fixed
suse enterprise sap 15 SP6
140.1.0-150200.152.193.1
fixed
suse enterprise sap 15 SP7
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP2
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP3
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP4
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP5
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP6
140.1.0-150200.152.193.1
fixed
suse enterprise server 15 SP7
140.1.0-150200.152.193.1
fixed
MozillaThunderbird
suse enterprise desktop 15 SP6
140.1.0-150200.8.230.1
fixed
suse enterprise desktop 15 SP7
140.1.0-150200.8.230.1
fixed
suse enterprise sap 15 SP6
140.1.0-150200.8.230.1
fixed
suse enterprise sap 15 SP7
140.1.0-150200.8.230.1
fixed
suse enterprise server 15 SP6
140.1.0-150200.8.230.1
fixed
suse enterprise server 15 SP7
140.1.0-150200.8.230.1
fixed
suse enterprise workstation 15 SP6
140.1.0-150200.8.230.1
fixed
suse enterprise workstation 15 SP7
140.1.0-150200.8.230.1
fixed
MozillaThunderbird-translations-common
suse enterprise desktop 15 SP6
140.1.0-150200.8.230.1
fixed
suse enterprise desktop 15 SP7
140.1.0-150200.8.230.1
fixed
suse enterprise sap 15 SP6
140.1.0-150200.8.230.1
fixed
suse enterprise sap 15 SP7
140.1.0-150200.8.230.1
fixed
suse enterprise server 15 SP6
140.1.0-150200.8.230.1
fixed
suse enterprise server 15 SP7
140.1.0-150200.8.230.1
fixed
suse enterprise workstation 15 SP6
140.1.0-150200.8.230.1
fixed
suse enterprise workstation 15 SP7
140.1.0-150200.8.230.1
fixed
MozillaThunderbird-translations-other
suse enterprise desktop 15 SP6
140.1.0-150200.8.230.1
fixed
suse enterprise desktop 15 SP7
140.1.0-150200.8.230.1
fixed
suse enterprise sap 15 SP6
140.1.0-150200.8.230.1
fixed
suse enterprise sap 15 SP7
140.1.0-150200.8.230.1
fixed
suse enterprise server 15 SP6
140.1.0-150200.8.230.1
fixed
suse enterprise server 15 SP7
140.1.0-150200.8.230.1
fixed
suse enterprise workstation 15 SP6
140.1.0-150200.8.230.1
fixed
suse enterprise workstation 15 SP7
140.1.0-150200.8.230.1
fixed
gstreamer-plugin-pipewire
suse enterprise server 15 SP4
0.3.49-150400.3.7.1
fixed
suse enterprise server 15 SP5
0.3.64-150500.3.7.2
fixed
libpipewire-0_3-0
suse enterprise server 15 SP2
0.3.6-150200.3.11.1
fixed
suse enterprise server 15 SP3
0.3.24-150300.4.8.1
fixed
suse enterprise server 15 SP4
0.3.49-150400.3.7.1
fixed
suse enterprise server 15 SP5
0.3.64-150500.3.7.2
fixed
pipewire
suse enterprise server 15 SP2
0.3.6-150200.3.11.1
fixed
suse enterprise server 15 SP3
0.3.24-150300.4.8.1
fixed
suse enterprise server 15 SP4
0.3.49-150400.3.7.1
fixed
suse enterprise server 15 SP5
0.3.64-150500.3.7.2
fixed
pipewire-lang
suse enterprise server 15 SP4
0.3.49-150400.3.7.1
fixed
suse enterprise server 15 SP5
0.3.64-150500.3.7.2
fixed
pipewire-modules
suse enterprise server 15 SP2
0.3.6-150200.3.11.1
fixed
suse enterprise server 15 SP3
0.3.24-150300.4.8.1
fixed
pipewire-modules-0_3
suse enterprise server 15 SP4
0.3.49-150400.3.7.1
fixed
suse enterprise server 15 SP5
0.3.64-150500.3.7.2
fixed
pipewire-spa-plugins-0_2
suse enterprise server 15 SP2
0.3.6-150200.3.11.1
fixed
suse enterprise server 15 SP3
0.3.24-150300.4.8.1
fixed
suse enterprise server 15 SP4
0.3.49-150400.3.7.1
fixed
suse enterprise server 15 SP5
0.3.64-150500.3.7.2
fixed
pipewire-spa-tools
suse enterprise server 15 SP2
0.3.6-150200.3.11.1
fixed
suse enterprise server 15 SP3
0.3.24-150300.4.8.1
fixed
suse enterprise server 15 SP4
0.3.49-150400.3.7.1
fixed
suse enterprise server 15 SP5
0.3.64-150500.3.7.2
fixed
pipewire-tools
suse enterprise server 15 SP2
0.3.6-150200.3.11.1
fixed
suse enterprise server 15 SP3
0.3.24-150300.4.8.1
fixed
suse enterprise server 15 SP4
0.3.49-150400.3.7.1
fixed
suse enterprise server 15 SP5
0.3.64-150500.3.7.2
fixed
xdg-desktop-portal
suse enterprise server 15 SP2
1.8.0-150200.5.8.1
fixed
suse enterprise server 15 SP3
1.8.0-150200.5.8.1
fixed
suse enterprise server 15 SP4
1.10.1-150400.3.8.1
fixed
suse enterprise server 15 SP5
1.16.0-150500.3.8.1
fixed
xdg-desktop-portal-devel
suse enterprise server 15 SP2
1.8.0-150200.5.8.1
fixed
suse enterprise server 15 SP3
1.8.0-150200.5.8.1
fixed
suse enterprise server 15 SP4
1.10.1-150400.3.8.1
fixed
suse enterprise server 15 SP5
1.16.0-150500.3.8.1
fixed
xdg-desktop-portal-lang
suse enterprise server 15 SP2
1.8.0-150200.5.8.1
fixed
suse enterprise server 15 SP3
1.8.0-150200.5.8.1
fixed
suse enterprise server 15 SP4
1.10.1-150400.3.8.1
fixed
suse enterprise server 15 SP5
1.16.0-150500.3.8.1
fixed
Common Weakness Enumeration
References
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1941377%2C1960948%2C1966187%2C1966505%2C1970764%2C1942930
https://www.mozilla.org/security/advisories/mfsa2025-51/
https://www.mozilla.org/security/advisories/mfsa2025-54/