This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-74943 →
DEBIAN-CVE-2026-74943
Use-after-free in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 1...
Original description
The description as published by the source.
Use-after-free in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Debian:12
firefox-esr
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"140.14.0esr-1~deb12u1"}]}]
Debian:13
firefox-esr
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"140.14.0esr-1~deb13u1"}]}]
Debian:14
firefox-esr
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"140.14.0esr-2"}]}]
Debian:12
thunderbird
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:140.14.0esr-1~deb12u1"}]}]
Debian:13
thunderbird
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:140.14.0esr-1~deb13u1"}]}]
Debian:14
thunderbird
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:140.14.0esr-1"}]}]
References
- advisory security-tracker.debian.org