# CVE-2026-82608: Kamailio out-of-bounds read in AVP Handler

Source: https://junglewise.ai/threats/cve-2026-82608-kamailio-out-of-bounds-read-in-avp-handler  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-31. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-82608 · Severity: high · CVSS 7.4 · Published 2026-08-31

Kamailio, an open-source SIP server commonly used in telecommunications infrastructure, contains a vulnerability in its AVP (Attribute-Value Pair) handler component that can allow remote attackers to read memory outside intended boundaries. An attacker can exploit this flaw to access sensitive data or cause a service crash without authentication, potentially disrupting VoIP call routing and session management.

Technologies: [Kamailio](https://junglewise.ai/threats/technologies/kamailio). Vendors: [Kamailio](https://junglewise.ai/threats/vendors/kamailio).

## Quick answers

**Is CVE-2026-82608 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-82608 being exploited in the wild.

**How severe is CVE-2026-82608?** High severity, with a CVSS score of 7.4, published 31 August 2026.

**Which products and versions are affected?** Kamailio 5.5.0 and 6.0.7 and prior.

**Is there a fix for CVE-2026-82608?** A patch was published on 2026-07-16: Patch merged via PR #4823 on July 16, 2026 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-82608 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-82608?** Check whether you run Kamailio at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is an out-of-bounds read in the get_4bytes() function within the ims_registrar_scscf module's cxdx_avp.c component, which handles AVP (Attribute-Value Pair) parsing in the IMS (IP Multimedia Subsystem) registrar. The root cause is insufficient length validation before reading 4-byte values from network packets, allowing attackers to read memory beyond allocated buffers. The vulnerability is network-reachable and requires no authentication; a remote attacker can craft malicious SIP messages to trigger the out-of-bounds read. Exploitation results in information disclosure and potential denial of service. Patch abb5d60af6eefbd367bf6588c5589566b090e272 adds length checks before calling get_4bytes() and has been merged into the main branch.

## Affected products

- Kamailio Kamailio 5.5.0 and 6.0.7 and prior

## Timeline

- 2026-08-31: disclosed
- 2026-07-16: patched: Patch merged via PR #4823 on July 16, 2026

## References

- [https://github.com/Kamailio/Kamailio/commit/abb5d60af6eefbd367bf6588c5589566b090e272](https://github.com/Kamailio/Kamailio/commit/abb5d60af6eefbd367bf6588c5589566b090e272)
- [https://github.com/Kamailio/Kamailio/pull/4823](https://github.com/Kamailio/Kamailio/pull/4823)

## Related threats

- [Kamailio stack buffer overflow in ims_qos_npn module](https://junglewise.ai/threats/cve-2026-106804-a-stack-based-buffer-overflow-exists-in-kamailio-v6-1-3-and-v6-1)
- [Kamailio stack buffer overflow in ims_registrar_pcscf module](https://junglewise.ai/threats/cve-2026-106803-a-stack-based-buffer-overflow-exists-in-kamailio-v6-1-3-and-v6-1)
- [Kamailio sipt module buffer overflow in ISUP parser](https://junglewise.ai/threats/cve-2026-108822-a-vulnerability-was-detected-in-kamailio-up-to-6-0-7-6-1-3-the)
- [Kamailio heap buffer overflow in CDP Diameter Receiver](https://junglewise.ai/threats/cve-2026-93962-a-weakness-has-been-identified-in-kamailio-up-to-5-8-8-6-0-7-6-1)
- [Kamailio ims_registrar_pcscf double free in security agreement parsing](https://junglewise.ai/threats/cve-2026-52023-kamailio-ims-registrar-pcscf-double-free-in-security-agreement)