A vulnerability was detected in Kamailio 5.5. The affected element is the function sr_push_yy_state of the file src/core/cfg.lex of the component Configuration File Handler. The manipulation results in use after free. The attack must be initiated from a local position. The exploit is now public and may be used. The real existence of this vulnerability is still doubted at the moment. This attack requires manipulating config files which might not be a realistic scenario in many cases. The vendor was contacted early about this disclosure but did not respond in any way.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 1
- First seenCVSS 1.9 · kamailioNVD modified 2026-10-19 13:10
Affected (CPE criteria) 1
cpe:2.3:a:kamailio:kamailio:5.5.0:*:*:*:*:*:*:*
References 8
- https://shimo.im/docs/ZzkLMVMLOzIRlpAQ/ Exploit, Third Party Advisory
- https://vuldb.com/?ctiid.329875 Permissions Required, VDB Entry
- https://vuldb.com/?id.329875 Third Party Advisory, VDB Entry
- https://vuldb.com/?submit.673225 Third Party Advisory, VDB Entry
- https://www.openwall.com/lists/oss-security/2025/11/02/3
- http://www.openwall.com/lists/oss-security/2025/10/27/12
- http://www.openwall.com/lists/oss-security/2025/10/27/8
- https://www.openwall.com/lists/oss-security/2025/10/27/8 Issue Tracking, Mailing List