Out-of-bounds read in Asterisk Open Source and Certified Asterisk - CVE-2026-57184
Published: June 26, 2026
Vulnerability identifier: #VU135553
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-57184
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds read in the chan_ooh323 Q.931 information element parser when processing crafted setup packets. A remote attacker can send specially crafted setup packets to cause a denial of service.
The chan_ooh323 addon channel driver must be explicitly compiled and installed, and the port used by chan_ooh323 must be open to the public.
Affected software
Asterisk Open Source
Certified Asterisk
Certified Asterisk
How to mitigate CVE-2026-57184
Install security update from vendor's website.
Asterisk Open Source - addressed in versions 20.20.1, 21.12.3, 22.10.1, 23.4.1
Certified Asterisk - addressed in versions 20.7-cert11, 22.8-cert3
Certified Asterisk - addressed in versions 20.7-cert11, 22.8-cert3