[USN-8050-1] Apache Traffic Server vulnerability

[noreply+usn-bot at canonical.com]

==========================================================================
Ubuntu Security Notice USN-8050-1
February 18, 2026

trafficserver vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

trafficserver could be made to crash if it received specially crafted
input.

Software Description:
- trafficserver: fast, scalable and extensible HTTP/1.1 and HTTP/2.0 caching proxy

Details:

Masakazu Kitajo discovered that Apache Traffic Server did not properly
handle the Valid Host header field. An attacker could possibly use this
issue to cause a denial of service (DoS).

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.10
  trafficserver                   9.2.5+ds-1ubuntu2.1

Ubuntu 24.04 LTS
  trafficserver                   9.2.3+ds-1+deb12u1ubuntu0.1

Ubuntu 22.04 LTS
  trafficserver                   9.1.1+ds-2ubuntu0.1

After a standard system update you need to restart Apache Traffic Server
to make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-8050-1
  CVE-2024-50305

Package Information:
  https://launchpad.net/ubuntu/+source/trafficserver/9.2.5+ds-1ubuntu2.1
  https://launchpad.net/ubuntu/+source/trafficserver/9.2.3+ds-1+deb12u1ubuntu0.1
  https://launchpad.net/ubuntu/+source/trafficserver/9.1.1+ds-2ubuntu0.1
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