Home / mailings [SECURITY] [DSA 6003-1] firefox-esr security update
Posted on 18 September 2025
Debian Security Advisory- -------------------------------------------------------------------------
Debian Security Advisory DSA-6003-1 security@debian.org
https://www.debian.org/security/ Moritz Muehlenhoff
September 18, 2025 https://www.debian.org/security/faq
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Package : firefox-esr
CVE ID : CVE-2025-10527 CVE-2025-10528 CVE-2025-10529
CVE-2025-10532 CVE-2025-10533 CVE-2025-10536
CVE-2025-10537
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 bypass of the same-origin
policy.
Debian follows the extended support releases (ESR) of Firefox.
So starting with this update we're now following the 140.x releases.
Between 128.x and 140.x, Firefox has seen a number of feature
updates. For more information please refer to
https://www.firefox.com/en-US/firefox/140.0esr/releasenotes/
For the oldstable distribution (bookworm), these problems have been fixed
in version 140.3.0esr-1~deb12u1.
For the stable distribution (trixie), these problems have been fixed in
version 140.3.0esr-1~deb13u1.
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 Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
