CVE-2025-10527

Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability affects Firefox < 143, Firefox ESR < 140.3, Thunderbird < 143, and Thunderbird < 140.3.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.1 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
mozillaCNA
---
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CISA-ADPADP
7.1 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 13%
VendorProductVersion
mozillafirefox
𝑥
< 140.3.0
mozillafirefox
𝑥
≤ 143.0
mozillathunderbird
𝑥
< 140.3.0
mozillathunderbird
141.0 ≤
𝑥
< 143.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
firefox
sid
144.0.2-1
fixed
firefox-esr
bullseye
vulnerable
bullseye (security)
140.4.0esr-1~deb11u1
fixed
bookworm
vulnerable
bookworm (security)
140.4.0esr-1~deb12u1
fixed
trixie
vulnerable
trixie (security)
140.4.0esr-1~deb13u1
fixed
forky
140.4.0esr-1
fixed
sid
140.4.0esr-1
fixed
thunderbird
bullseye
vulnerable
bullseye (security)
1:140.4.0esr-1~deb11u1
fixed
bookworm
vulnerable
bookworm (security)
1:140.4.0esr-1~deb12u1
fixed
trixie
vulnerable
trixie (security)
1:140.4.0esr-1~deb13u1
fixed
forky
1:140.4.0esr-1
fixed
sid
1:140.4.0esr-1
fixed
Common Weakness Enumeration
References
https://bugzilla.mozilla.org/show_bug.cgi?id=1984825
https://www.mozilla.org/security/advisories/mfsa2025-73/
https://www.mozilla.org/security/advisories/mfsa2025-75/
https://www.mozilla.org/security/advisories/mfsa2025-77/
https://www.mozilla.org/security/advisories/mfsa2025-78/