CVE-2026-44236
Publication date 11 June 2026
Last updated 23 September 2026
Ubuntu priority
Description
rabbitmq-c is a C-language AMQP client library for RabbitMQ. Prior to 0.16.0, a malicious AMQP server can send an undersized connection.tune.frame_max value during amqp_login(), and rabbitmq-c accepts the value in amqp_login_inner() in librabbitmq/amqp_socket.c. amqp_tune_connection() in librabbitmq/amqp_connection.c uses frame_max to reallocate the outbound buffer without enforcing AMQP_FRAME_MIN_SIZE. Immediate serialization of connection.tune-ok through amqp_frame_to_bytes() writes beyond the undersized heap allocation, causing memory corruption and likely denial of service. An on-path attacker can also trigger the flaw against plaintext AMQP traffic. Code execution is theoretically possible but was not demonstrated. This issue is fixed in version 0.16.0.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| librabbitmq | 26.04 LTS resolute |
Fixed 0.15.0-1ubuntu0.26.04.1
|
| 24.04 LTS noble |
Fixed 0.11.0-1ubuntu0.1
|
|
| 22.04 LTS jammy |
Fixed 0.10.0-1ubuntu2.1
|
|
| 20.04 LTS focal |
Fixed 0.10.0-1ubuntu0.20.04.1~esm1
|
|
| 18.04 LTS bionic |
Fixed 0.8.0-1ubuntu0.18.04.2+esm1
|
|
| 16.04 LTS xenial |
Fixed 0.7.1-1ubuntu0.2+esm1
|
|
| 14.04 LTS trusty |
Fixed 0.4.1-1ubuntu0.1~esm2
|
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CVSS version: CVSS v3.0
Base score
7.1 · High
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
References
Related Ubuntu Security Notices (USN)
- USN-8437-1
- rabbitmq-c vulnerabilities
- 16 June 2026
- USN-8724-1
- rabbitmq-c vulnerabilities
- 3 September 2026