PT-2026-31442 · Kamailio · Kamailio

Published 2026-04-08 · Updated 2026-04-23 · CVE-2026-39863

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Kamailio versions prior to 6.1.1, prior to 6.0.6, and prior to 5.8.8

Description Kamailio, an open source SIP Signaling Server, contains a flaw where a specially crafted data packet sent over TCP can lead to a denial of service (process crash). This impacts Kamailio instances with TCP or TLS listeners. The issue resides in the core of Kamailio.

Recommendations Update to version 5.1.1 or later Update to version 6.0.6 or later Update to version 5.8.8 or later

Fix

DoS

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

CVE-2026-39863

Affected Products

Kamailio

References · 11

• https://github.com/kamailio/kamailio/security/advisories/GHSA-2wj4-f825-2h2f · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2026-39863 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-39863 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-39863 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-39863 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-39863 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-39863 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-39863 · Vendor Advisory
• https://twitter.com/enablesecurity/status/2047359892797739512 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2041985746999914643 · Twitter Post
• https://security.alpinelinux.org/vuln/CVE-2026-39863 · Note