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Debian Apache2 Important Denial of Service Issue DSA-6323-1 CVE-2026-49975

debian
Calendar Grey June 6, 2026
Debian Logo
Upgrade Apache 2.4.67-1~deb12u3 in Debian to mitigate denial of service issue from cookie header flaws.
It was discovered that incorrect cookie header accounting in the HTTP/2 implementation of the Apache HTTP server may result in denial of service (excessive resources consumption)
Topics%20covered

Topics Covered

security advisory denial of service debian important apache2 cookie

Summary

For the oldstable distribution (bookworm), this problem has been fixed
in version 2.4.67-1~deb12u3.

For the stable distribution (trixie), this problem has been fixed in
version 2.4.67-1~deb13u3.

We recommend that you upgrade your apache2 packages.

For the detailed security status of apache2 please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/apache2

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: apache2
CVE ID: CVE-2026-49975

Topics%20covered

Topics Covered

security advisory denial of service debian important apache2 cookie

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