Out-of-Bounds Affecting kamailio package, versions <6.0.1-1+deb13u2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ECHOLATEST-KAMAILIO-19434979
- published31 Aug 2026
- disclosed8 Apr 2026
Introduced: 8 Apr 2026
CVE-2026-39863 (opens in a new tab)How to fix?
Upgrade Echo:latest kamailio to version 6.0.1-1+deb13u2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kamailio package and not the kamailio package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
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.