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Debian 11: DLA-4277-1 Firefox-ESR Important Code Execution Threat

debian lts
Calendar Grey August 21, 2025
Dist Debian Esm H88
Debian LTS DLA-4280-1 addresses severe vulnerabilities in Thunderbird, potentially allowing unauthorized access or privilege escalation.
Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code, sandbox escape or bypass of the same...
Topics%20covered

Topics Covered

security advisory remote code execution debian important sandbox escape firefox-esr

Summary

For Debian 11 bullseye, these problems have been fixed in version
128.14.0esr-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
important
Lowest
Low
Medium
High
Critical

Package: firefox-esr
Version: 128.14.0esr-1~deb11u1
CVE ID: CVE-2025-9179 CVE-2025-9180 CVE-2025-9181 CVE-2025-9185

Topics%20covered

Topics Covered

security advisory remote code execution debian important sandbox escape firefox-esr

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