Description
Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.1.1, 6.0.6, and 5.8.8, an out-of-bounds access in the core of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted data packet sent over TCP. The issue impacts Kamailio instances having TCP or TLS listeners. This vulnerability is fixed in 5.1.1, 6.0.6, and 5.8.8.
Scores
CVSS v3
7.5
EPSS
0.0004
EPSS Percentile
13.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-119
Status
published
Products (4)
kamailio/kamailio
6.1.0
kamailio/kamailio
< 5.8.8 (2 CPE variants)
kamailio/kamailio
>= 6.0.0, < 6.0.6
kamailio/kamailio
>= 6.1.0, < 6.1.1
Published
Apr 08, 2026
Tracked Since
Apr 09, 2026