CVE-2025-10527

HIGH

Firefox < 143.0 and 140.3-140.* - Use-After-Free in Graphics Canvas2D

Title source: llm

Description

Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.

References (7)

Core 7

Core References

Mailing List

https://lists.debian.org/debian-lts-announce/2025/09/msg00020.html

Mailing List

https://lists.debian.org/debian-lts-announce/2025/09/msg00026.html

Broken Link

https://bugzilla.mozilla.org/show_bug.cgi?id=1984825

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-73/

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-75/

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-77/

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-78/

Scores

CVSS v3 7.1

EPSS 0.0006

EPSS Percentile 19.0%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-416

Status published

Products (7)

mozilla/firefox < 140.3.0

mozilla/firefox < 143.0

Mozilla/Firefox 140.3 - 140.*

Mozilla/Firefox 143

mozilla/thunderbird < 140.3.0

Mozilla/Thunderbird 140.3 - 140.*

Mozilla/Thunderbird 143

Published Sep 16, 2025

Tracked Since Feb 18, 2026