Description
rabbitmq-c is a C-language AMQP client library for RabbitMQ. Prior to version 0.17.0, the bounds check (*offset = o + len) <= encoded.len overflows when o + len > SIZE_MAX on 32-bit systems. len is a uint32_t read from the AMQP wire as a BYTES/UTF8 field length. The overflow wraps the check to a small value that passes, producing a decoded amqp_bytes_t with a multi-GB .len pointing into a small frame buffer. This results in an out-of-bounds read of up to ~4GB of process memory on 32-bit systems (ARM, MIPS, x86 ILP32, embedded IoT AMQP clients). Enabling information disclosure or denial of service. Not exploitable on 64-bit systems where size_t is 64-bit. This issue has been patched in version 0.17.0.
Published: 2026-11-10
Score: 7.4 High
EPSS: n/a
KEV: No
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Remediation

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4763-1 librabbitmq security update
Debian DSA Debian DSA DSA-6447-1 librabbitmq security update
Ubuntu USN Ubuntu USN USN-8724-1 rabbitmq-c vulnerabilities
History

Tue, 10 Nov 2026 16:30:00 +0000

Type Values Removed Values Added
Description rabbitmq-c is a C-language AMQP client library for RabbitMQ. Prior to version 0.17.0, the bounds check (*offset = o + len) <= encoded.len overflows when o + len > SIZE_MAX on 32-bit systems. len is a uint32_t read from the AMQP wire as a BYTES/UTF8 field length. The overflow wraps the check to a small value that passes, producing a decoded amqp_bytes_t with a multi-GB .len pointing into a small frame buffer. This results in an out-of-bounds read of up to ~4GB of process memory on 32-bit systems (ARM, MIPS, x86 ILP32, embedded IoT AMQP clients). Enabling information disclosure or denial of service. Not exploitable on 64-bit systems where size_t is 64-bit. This issue has been patched in version 0.17.0.
Title rabbitmq-c: amqp_decode_bytes size_t integer overflow bypasses bounds check on 32-bit (OOB read)
Weaknesses CWE-125
CWE-190
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-11-10T16:42:38.906Z

Reserved: 2026-07-07T19:41:00.005Z

Link: CVE-2026-59986

cve-icon Vulnrichment

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cve-icon NVD

Status : Received

Published: 2026-11-10T17:17:45.043

Modified: 2026-11-10T17:17:45.043

Link: CVE-2026-59986

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses