Bug 2562165 (CVE-2026-57194) - CVE-2026-57194 asterisk: Asterisk: Denial of Service via out-of-bounds write in chan_unistim
Summary: CVE-2026-57194 asterisk: Asterisk: Denial of Service via out-of-bounds write ...
Keywords:
Status: NEW
Alias: CVE-2026-57194
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2564818 2564819 2564821 2564822
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-27 18:09 UTC by OSIDB Bzimport
Modified: 2026-11-02 09:53 UTC (History)
0 users

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Description OSIDB Bzimport 2026-10-27 18:09:24 UTC 
Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, an out-of-bounds write in `chan_unistim` `DIALPAGE` digit handling can overflow the `phone_number` field and crash Asterisk when an attacker sends a carefully crafted incoming request packet. The `chan_unistim` module must be loaded and configured with a valid `UNISTIM UDP port` that the attacker can reach. The attacker must register as a configured `phone MAC`, or the deployment must have an equivalent `production/autoprovisioning` path that allows the client to reach the main page. This issue is fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.
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