CVE-2026-106803
A stack-based buffer overflow exists in Kamailio v6.1.3 and v6.1.4 in the ims_registrar_pcscf module
- Risk score
- 68/100
- CVSS
- 9.8 v3.1
- Exploit chance (30 days)
- 0.3%
- Published
- 2 Nov 2026
Open in the live forecast Today's forecast
What to know
- What it is
- A stack-based buffer overflow exists in Kamailio v6.1.3 and v6.1.4 in the ims_registrar_pcscf module, allowing an unauthenticated remote attacker to trigger stack corruption and terminate the P-CSCF process, resulting in denial of service.
- Affected
- {'products': ['Kamailio'], 'packages': [], 'versions': ['v6.1.3', 'v6.1.4']}
- Fix
- Upgrade to a fixed version, check the linked advisory for details
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 9.8 critical
- Remotely exploitable without logging in
References
Original description
A stack-based buffer overflow exists in Kamailio v6.1.3 and v6.1.4 in the ims_registrar_pcscf module. When processing a crafted application/reginfo+xml NOTIFY message, process_contact() copies an attacker-controlled port value from the alias parameter into a fixed 5-byte stack buffer without validating its length. An unauthenticated remote attacker can trigger stack corruption and terminate the P-CSCF process, resulting in denial of service.
Last activity 2 Nov 2026. Patch Forecast updates every hour.