Debian alert DLA-4439-1 (firefox-esr)

From:
             
 
Emilio Pozuelo Monfort <pochu@debian.org>
To:
             
 
<debian-lts-announce@lists.debian.org>
Subject:
             
 
[SECURITY] [DLA 4439-1] firefox-esr security update
Date:
             
 
Thu, 15 Jan 2026 19:39:34 +0100
Message-ID:
             
 
<20260115183934.0C02D5F00083@kamino>
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Debian LTS Advisory DLA-4439-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/               Emilio Pozuelo Monfort
January 15, 2026                              https://wiki.debian.org/LTS
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Package        : firefox-esr
Version        : 140.7.0esr-1~deb11u1
CVE ID         : CVE-2025-14327 CVE-2026-0877 CVE-2026-0878 CVE-2026-0879
                 CVE-2026-0880 CVE-2026-0882 CVE-2026-0883 CVE-2026-0884
                 CVE-2026-0885 CVE-2026-0886 CVE-2026-0887 CVE-2026-0890
                 CVE-2026-0891

Multiple security issues have been found in the Mozilla Firefox web
browser, which could potentially result in the execution of arbitrary
code, sandbox escape, information disclosure or spoofing.

For Debian 11 bullseye, these problems have been fixed in version
140.7.0esr-1~deb11u1.

We recommend that you upgrade your firefox-esr packages.

For the detailed security status of firefox-esr please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/firefox-esr

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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