Ubuntu 26.04 rabbitmq-c Critical Buffer Overflow and DoS Issues 8437-1

ubuntu

June 16, 2026

Several security issues were fixed in rabbitmq-c.

Summary

Several security issues were fixed in rabbitmq-c.

Software Description:

- librabbitmq: AMQP client library written in C

Details:

It was discovered that rabbitmq-c exposed credentials in command-line

arguments under certain circumstances. A local attacker could possibly use

this issue to obtain sensitive information. This issue only affected Ubuntu

22.04 LTS and Ubuntu 24.04 LTS. (CVE-2023-35789)

It was discovered that rabbitmq-c incorrectly handled AMQP frame lengths

under certain circumstances, which could lead to an out-of-bounds read. A

remote attacker could possibly use this issue to cause rabbitmq-c to crash,

resulting in a denial of service. (CVE-2026-44235)

It was discovered that rabbitmq-c incorrectly handled AMQP login handshakes

under certain circumstances, which could lead to a heap buffer overflow. A

remote attacker could possibly use this issue to cause rabbitmq-c to crash,

resulting in a denial of service, or execute arbitrary code.

(CVE-2026-44236)

Topics Covered

security advisory denial of service critical Ubuntu heap buffer overflow credentials exposure

Update Instructions

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

Ubuntu 26.04 LTS
  amqp-tools                      0.15.0-1ubuntu0.26.04.1
  librabbitmq4                    0.15.0-1ubuntu0.26.04.1

Ubuntu 25.10
  amqp-tools                      0.15.0-1ubuntu0.25.10.1
  librabbitmq4                    0.15.0-1ubuntu0.25.10.1

Ubuntu 24.04 LTS
  amqp-tools                      0.11.0-1ubuntu0.1
  librabbitmq4                    0.11.0-1ubuntu0.1

Ubuntu 22.04 LTS
  amqp-tools                      0.10.0-1ubuntu2.1
  librabbitmq4                    0.10.0-1ubuntu2.1

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