Kamailio up to 6.0.7/6.1.3 sipt ss7_parser.c isup_get_calling_party length buffer overflow

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Kamailio up to 6.0.7/6.1.3. The impacted element is the function isup_get_calling_party of the file src/modules/sipt/ss7_parser.c of the component sipt Module. This manipulation of the argument length causes buffer overflow. The identification of this vulnerability is CVE-2026-108822. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Kamailio up to 6.0.7/6.1.3. It has been declared as problematic. Affected by this vulnerability is the function isup_get_calling_party of the file src/modules/sipt/ss7_parser.c of the component sipt Module. The manipulation of the argument length with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect availability.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-108822. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 6.0.8 or 6.1.4 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 3667bebf8d0bea07ed16218fd921d07db87aeb21 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.

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Productinfo

Name

• Kamailio

Version

• 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

License

• open-source

Website

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

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Accepted

• Submit #964495: Kamailio Kamailio SIP Server 6.1.3 (stable, verified) — fixed in PR #4905 (merged 2026-09-08) CWE-120: Buffer Overflow (Static/Global Buffer Overflow) (by JerryGW)

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