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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| kamailio | kamailio | < 5.8.8, >= 6.0.0, < 6.0.6, >= 6.1.0, < 6.1.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | kamailio | 6.1.1-2 | — |
| Debian 13 | kamailio | 6.0.1-1+deb13u2 | — |
| Debian 12 | kamailio | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | kamailio | No fix yet | — |
| Ubuntu 26.04 LTS | kamailio | No fix yet | — |
| Ubuntu 25.10 | kamailio | No fix yet | — |
| Ubuntu 24.04 LTS | kamailio | No fix yet | — |
| Ubuntu 22.04 LTS | kamailio | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | kamailio | No fix yet | — |
| Ubuntu Pro 18.04 LTS | kamailio | No fix yet | — |
| Ubuntu Pro 16.04 LTS | kamailio | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | kamailio | 6.0.6-r0 | — |
| Alpine v3.23 | kamailio | 6.0.6-r0 | — |
| Alpine v3.22 | kamailio | 6.0.6-r0 | — |
| Alpine v3.21 | kamailio | 5.8.8-r0 | — |
| Alpine v3.20 | kamailio | 5.8.8-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.14 | kamailio | 5.4.5-r2 | — |