Description
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.
Affected products
kamailio: kamailio
References8
- shimo.im/docs/ZzkLMVMLOzIRlpAQ/ ExploitThird Party Advisory
- vuldb.com/?ctiid.329875 Permissions RequiredVDB Entry
- vuldb.com/?id.329875 Third Party AdvisoryVDB Entry
- vuldb.com/?submit.673225 Third Party AdvisoryVDB Entry
- www.openwall.com/lists/oss-security/2025/11/02/3
- www.openwall.com/lists/oss-security/2025/10/27/12
- www.openwall.com/lists/oss-security/2025/10/27/8
- www.openwall.com/lists/oss-security/2025/10/27/8 Issue TrackingMailing List
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 4.0
-
1.9
LOW
Score source: CNA
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 14 · as of 10 November 2026
- CWE
- CWE-119CWE-416
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