UBUNTU-CVE-2026-106804
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Summary:
Details: A stack-based buffer overflow exists in Kamailio v6.1.3 and v6.1.4 in the ims_qos_npn module. The w_rx_aar_register() function copies the attacker-controlled host field from the SIP `Via` header into a fixed 46-byte stack buffer without validating its length. An unauthenticated remote attacker can trigger the vulnerability with a crafted SIP `REGISTER` request, causing stack corruption and termination of the affected Kamailio instance, resulting in denial of service.
References: https://ubuntu.com/security/CVE-2026-106804, https://www.cve.org/CVERecord?id=CVE-2026-106804, https://gist.github.com/hackeryounow/f5af75502ea6df600428c46bb9bbf39e, https://github.com/kamailio/kamailio/issues/4953
Affected packages
Package
Name: kamailio
Purl: pkg:deb/ubuntu/kamailio?arch=source&distro=esm-apps%2Fxenial
Affected ranges
Type: ECOSYSTEM
Events:
