Kamailio up to 5.8.8/6.0.7/6.1.4/6.2.0-dev1 CDP Diameter Receiver receiver.c shm_malloc heap-based overflow

Summaryinfo

A vulnerability has been found in Kamailio up to 5.8.8/6.0.7/6.1.4/6.2.0-dev1 and classified as critical. This affects the function shm_malloc of the file src/modules/cdp/receiver.c of the component CDP Diameter Receiver. The manipulation leads to heap-based overflow. This vulnerability is documented as CVE-2026-93962. The attack can be initiated remotely. Additionally, an exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Kamailio up to 5.8.8/6.0.7/6.1.4/6.2.0-dev1 and classified as critical. This issue affects the function shm_malloc of the file src/modules/cdp/receiver.c of the component CDP Diameter Receiver. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-93962. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known.

The exploit is available at github.com. It is declared as proof-of-concept.

Upgrading to version 6.0.8 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 38711a3e788de0130d48cb485578c482b57d9351/4f62235b6f477b649c5cc18b0c81b4e26c949b98/4f62235b6f477b649c5cc18b0c81b4e26c949b98 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• Kamailio

Version

• 5.8.0
• 5.8.1
• 5.8.2
• 5.8.3
• 5.8.4
• 5.8.5
• 5.8.6
• 5.8.7
• 5.8.8
• 6.0.0
• 6.0.1
• 6.0.2
• 6.0.3
• 6.0.4
• 6.0.5
• 6.0.6
• 6.0.7
• 6.1.0
• 6.1.1
• 6.1.2
• 6.1.3
• 6.1.4
• 6.2.0-dev1

License

• open-source

Website

• Product: https://github.com/kamailio/kamailio/

CPE 2.3info

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CPE 2.2info

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Submitinfo

Accepted

• Submit #944244: Kamailio Kamailio SIP Server 6.1.4 Heap-based Buffer Overflow (by WeiYi)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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