Buffer overflow in Kamailio
CVE-2026-82608
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."
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (33.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
- Kamailio — versions 5.0, 5.1, 5.2
Weakness classification (CWE)
References
- vuldb.com/vuln/397109 (technical-description, vdb-entry)
- vuldb.com/vuln/397109/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-82608 (third-party-advisory)
- vuldb.com/submit/892903 (third-party-advisory)
- github.com/kamailio/kamailio/issues/4816 (issue-tracking, exploit)
- github.com/Kamailio/Kamailio/pull/4823 (issue-tracking, patch)
- github.com/Kamailio/Kamailio/commit/abb5d60af6eefbd367bf6588c5589566b090e272 (patch)
- github.com/kamailio/kamailio/ (product)
Frequently asked questions
- What is CVE-2026-82608?
- CVE-2026-82608 is a high-severity vulnerability in Kamailio, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.4/10. Published 2026-08-31.
- How severe is CVE-2026-82608?
- High severity. CVSS v3 base score is 7.4 out of 10.