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Alerts This Week
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Debian 11 Varnish: DLA-4187-1 Critical Client-Side Desync Issue

debian lts
Calendar Grey May 29, 2025
Dist Debian Esm H88
Debian LTS Announcement DLA-4190-2 covers a critical vulnerability in Nginx. It's essential to apply the latest patches to protect your network immediately.
A client-side desync vulnerability can be triggered in Varnish, a high-performance web accelerator
Topics%20covered

Topics Covered

security advisory debian attack client-side varnish desync

Summary

For Debian 11 bullseye, this problem has been fixed in version
6.5.1-1+deb11u5.

We recommend that you upgrade your varnish packages.

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

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: varnish
Version: 6.5.1-1+deb11u5
CVE ID: CVE-2025-47905

Topics%20covered

Topics Covered

security advisory debian attack client-side varnish desync

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