CVE-2026-82608 Kamailio AVP cxdx_avp.c get_4bytes out-of-bounds
Remote attackers can trigger an out-of-bounds read in Kamailio's AVP handler, potentially exposing memory or causing crashes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-82608?
CVE-2026-82608 is a medium-severity memory corruption vulnerability in Kamailio, published on 31 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was determined in Kamailio up to 5.5.0/6.0.7. This affects the function get_4bytes of the file src/modules/ims_registrar_scscf/cxdx_avp.c of the component AVP Handler. Executing a manipulation can lead to out-of-bounds read. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized. This patch is called abb5d60af6eefbd367bf6588c5589566b090e272. It is advisable to implement a patch to correct this issue. The vendor points out, that "[v]ersion 5.5.0 is old and not maintained anymore."
Which versions are affected by CVE-2026-82608?
How do I fix CVE-2026-82608?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-82608 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-82608 exists.
Sources
Also known as DEBIAN-CVE-2026-82608, GHSA-cqrq-g7g6-656p, UBUNTU-CVE-2026-82608.