CVE-2026-44235
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 HEADER or METHOD frame during client login and cause unsigned size_t underflow in amqp_handle_input() in librabbitmq/amqp_connection.c. The parser subtracts HEADER_SIZE, fixed per-frame fields, and FOOTER_SIZE from state->target_size without first checking the minimum frame length. The wrapped encoded.len value is passed through amqp_decode_properties() to amqp_decode_table_internal(), where it defeats bounds checks and causes an out-of-bounds read and process crash. An on-path attacker can also trigger the issue when AMQP traffic is not protected by TLS with certificate validation. The demonstrated impact is denial of service, with no reliable memory disclosure or code execution shown. 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
6.5 · Medium
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/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