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Ubuntu 25.10 HAProxy Security Low DoS Failure Vulnerability USN-8037-2

ubuntu
Calendar Grey February 12, 2026
Dist Ubuntu Esm H88
HAProxy on Ubuntu 25.10 may crash due to specific crafted packets leading to denial of service. Update recommended.
HAProxy could be made to crash if it received specially crafted network traffic.

Summary

HAProxy could be made to crash if it received specially crafted network

traffic.

Software Description:

- haproxy: fast and reliable load balancing reverse proxy

Details:

Asim Viladi Oglu Manizada discovered that HAProxy incorrectly handled

certain INITIAL packets. A remote attacker could possibly use this issue

to cause HAProxy to crash, resulting in a denial of service.

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu network traffic medium haproxy

Update Instructions

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

Ubuntu 25.10
  haproxy                         3.0.12-0ubuntu0.25.10.3

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-8036-1

CVE-2026-26081

Severity
medium
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8036-1

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu network traffic medium haproxy

Package Information

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