Alerts This Week
Warning Icon 1 876
Alerts This Week
Warning Icon 1 876

Debian DSA-6264-1 Dnsmasq Important Denial of Service CVE-2026-2291

debian
Calendar Grey May 11, 2026
Debian Logo
Discover critical vulnerabilities in dnsmasq affecting Debian distributions and learn how to secure your systems promptly.
Multiple security vulnerabilities have been discovered in Dnsmasq, a lightweight DNS forwarder and DHCP server, which could result in cache poisoning, bypass of security controls, ...
Topics%20covered

Topics Covered

security advisory denial of service debian important cache poisoning dnsmasq

Summary

For the oldstable distribution (bookworm), these problems have been fixed
in version 2.90-4~deb12u2.

For the stable distribution (trixie), these problems have been fixed in
version 2.91-1+deb13u1.

We recommend that you upgrade your dnsmasq packages.

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

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/



Severity
important
Lowest
Low
Medium
High
Critical

Package: dnsmasq
CVE ID: CVE-2026-2291 CVE-2026-4890 CVE-2026-4891

Topics%20covered

Topics Covered

security advisory denial of service debian important cache poisoning dnsmasq

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here