CVE-2026-106803
Critical · 9.8CVSS
9.8
EPSS
0.5%
Published
Nov 2, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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