CVE-2026-57186

high

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.

References

https://github.com/asterisk/asterisk/tree/24.0.0-pre1

https://github.com/asterisk/asterisk/security/advisories/GHSA-h5hv-jmgj-92q2

https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3

https://github.com/asterisk/asterisk/releases/tag/23.4.1

https://github.com/asterisk/asterisk/releases/tag/22.10.1

https://github.com/asterisk/asterisk/releases/tag/21.12.3

https://github.com/asterisk/asterisk/commit/62a7a7037b1a145cabf95895b119cbae4d3c5a4f

https://github.com/asterisk/asterisk/commit/46c6c652d1de9bfbb061fab0b1f681cf60660998

https://github.com/asterisk/asterisk/commit/42d3552d2ac0efbb68c9ec7ade898b6de0bfa033

https://github.com/asterisk/asterisk/commit/0e776a837106d5d0d14503a53388337931045164

https://github.com/asterisk/asterisk/commit/07b9740cbc371ffa7936cf368089fd073250ea7c

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-111395

Details

Source: Mitre, NVD

Published: 2026-10-27

Updated: 2026-10-28

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

EPSS

EPSS: 0.00602