CVE-2026-57186 Asterisk: CVE-2022-37325 fix is absent from current chan_ooh323 Q.931 party-number parser
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-57186?
CVE-2026-57186 is a high-severity vulnerability in asterisk, published on 27 Oct 2026.
Official description
Asterisk is an open source private branch exchange and telephony toolkit. From 21.0.0-pre1 until Asterisk 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 22.8-cert3, the `chan_ooh323` `Q.931 party-number parser` lacks the `CVE-2022-37325` fix because that fix was never forward-ported from Asterisk 20 to later versions. Malformed Q.931 elements in an `OOH323 request` can therefore crash Asterisk. This issue affects Asterisk versions greater than 20. The `chan_ooh323` addon channel driver must be explicitly compiled and installed, which is not the default, and its port must be publicly reachable. This issue is fixed in Asterisk 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 22.8-cert3.
Weakness: CWE-839
Which versions are affected by CVE-2026-57186?
How do I fix CVE-2026-57186?
Upgrade to a fixed version.
Is CVE-2026-57186 being exploited?
There is no known exploitation of CVE-2026-57186 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-57186, GHSA-h5hv-jmgj-92q2, UBUNTU-CVE-2026-57186.