kamailio: Kamailio is an open source implementation of a SIP Signaling Server
CVE-2026-39864 is fixed in kamailio on 1 platform, first by DEBIAN-CVE-2026-39864, released April 8, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.0.5 and 5.8.7, an out-of-bounds read in the auth module of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted SIP packet if a successful user authentication without a database backend is followed by additional user identity checks. This vulnerability is fixed in 6.0.5 and 5.8.7.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| kamailio · Debian 13.5 (trixie) | 6.0.1-1+deb13u2 | DEBIAN-CVE-2026-39864 | Apr 8, 2026 |
| kamailio · Debian 14 | 6.0.5-1 | DEBIAN-CVE-2026-39864 | Apr 8, 2026 |
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