SB2026040878 - Out-of-bounds read in Kamailio

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Main Vulnerability Database SB2026040878

SB2026040878 - Out-of-bounds read in Kamailio

Published: April 8, 2026

Security Bulletin ID SB2026040878
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-39864)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote user to cause a denial of service.

The vulnerability exists due to out-of-bounds read in auth.so when processing a specially crafted SIP packet during additional user identity checks after successful RFC2617 authentication without a database backend. A remote privileged user can send a specially crafted SIP packet to cause a denial of service.

Exploitation requires a deployment that does not use a database backend and performs additional user identity checks after successful RFC2617 authentication.


Remediation

Install update from vendor's website.

References