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Alerts This Week
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Debian 11: DLA-4231-1 critical: firefox-esr code execution issues

debian lts
Calendar Grey June 26, 2025
Dist Debian Esm H88
Upgrade the firefox-esr package on Debian 11 to enhance security and mitigate serious vulnerabilities. Follow the steps to perform the upgrade efficiently
Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code
Topics%20covered

Topics Covered

security advisory security issue critical code execution debian firefox-esr

Summary

For Debian 11 bullseye, these problems have been fixed in version
128.12.0esr-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: 128.12.0esr-1~deb11u1
CVE ID: CVE-2025-6424 CVE-2025-6425 CVE-2025-6429 CVE-2025-6430

Topics%20covered

Topics Covered

security advisory security issue critical code execution debian firefox-esr

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