CVE-2025-1942

When String.toUpperCase() caused a string to get longer it was possible for uninitialized memory to be incorporated into the result string This vulnerability affects Firefox < 136 and Thunderbird < 136.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
mozillaCNA
---
---
CISA-ADPADP
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 52%
VendorProductVersion
mozillafirefox
𝑥
< 136.0
mozillathunderbird
𝑥
< 136.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
firefox
sid
145.0.1-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
firefox
questing
not-affected
plucky
not-affected
oracular
not-affected
noble
not-affected
jammy
not-affected
focal
Fixed 136.0+build3-0ubuntu0.20.04.1
released
thunderbird
questing
not-affected
plucky
not-affected
oracular
not-affected
noble
not-affected
jammy
not-affected
focal
dne
mozjs38
questing
dne
plucky
dne
oracular
dne
noble
dne
jammy
dne
focal
dne
bionic
needs-triage
mozjs52
questing
dne
plucky
dne
oracular
dne
noble
dne
jammy
dne
focal
needs-triage
bionic
ignored
mozjs68
questing
dne
plucky
dne
oracular
dne
noble
dne
jammy
dne
focal
ignored
mozjs78
questing
dne
plucky
dne
oracular
dne
noble
dne
jammy
ignored
focal
dne
mozjs91
questing
dne
plucky
dne
oracular
dne
noble
dne
jammy
ignored
focal
dne
mozjs102
questing
dne
plucky
dne
oracular
dne
noble
ignored
jammy
ignored
focal
dne
mozjs115
questing
dne
plucky
ignored
oracular
ignored
noble
ignored
jammy
dne
focal
dne