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VulnerabilityPublished

CVE-2026-106803: A stack-based buffer overflow exists in Kamailio v6.1.3 and v6.1.4 in the ims_registrar_pcscf module

Affects kamailioSource CVE Database V5

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Not known to be exploited.

Data as of 2 Nov 2026, 17:43 UTC

Severity
High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
GitHubkamailio/kamailiopkg:github/kamailio/kamailioOther threatsAffected
  • =6.1.3
  • =6.1.4
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Until a fix is available, consider restricting access to the affected service to trusted sources to reduce exposure.

Description

Kamailio versions 6.1.3 and 6.1.4 contain a stack-based buffer overflow vulnerability in the ims_registrar_pcscf module. The flaw occurs when processing a crafted application/reginfo+xml NOTIFY message, where an attacker-controlled port value is copied into a fixed 5-byte stack buffer without length validation. This can lead to stack corruption and termination of the P-CSCF process, causing a denial of service. The vulnerability can be triggered by an unauthenticated remote attacker.

References

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