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Debian 11: Firefox-ESR Critical Issues Addressed DLA-4335-1 CVE-2025-11708

debian lts
Calendar Grey October 17, 2025
Dist Debian Esm H88
Critical updates for firefox-esr fix multiple security issues, including arbitrary code execution and memory disclosure risks.
Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code, memory disclosure or cross-site scri...
Topics%20covered

Topics Covered

security advisory critical debian cross site scripting arbitrary code execution memory disclosure

Summary

For Debian 11 bullseye, these problems have been fixed in version
140.4.0esr-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/source-package/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


Severity
critical
Lowest
Low
Medium
High
Critical

Package: firefox-esr
Version: 140.4.0esr-1~deb11u1
CVE ID: CVE-2025-11708 CVE-2025-11709 CVE-2025-11710 CVE-2025-11711

Topics%20covered

Topics Covered

security advisory critical debian cross site scripting arbitrary code execution memory disclosure

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