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.
References (1)
Core 1
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/kamailio/kamailio/security/advisories/GHSA-2wj4-f825-2h2f
Scores
CVSS v3
7.5
EPSS
0.0045
EPSS Percentile
35.8%
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