Bug 2562208 (CVE-2026-57201)

Summary:	CVE-2026-57201 asterisk: asterisk: Denial of Service via stack buffer overflow in H.323 trace logging
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in Asterisk. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by sending a specially crafted network packet to an Asterisk instance with the H.323 channel driver enabled. The trace-logging function fails to bound the input size when writing to an internal buffer, resulting in a stack buffer overflow that crashes the Asterisk process.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2564824, 2564825, 2564827, 2564828
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Description OSIDB Bzimport 2026-10-27 18:17:40 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, a stack buffer overflow in the H.323 `ooTrace()` trace-logging function can occur when unbounded `vsprintf` writes into a fixed `2048-byte buffer`. A remote attacker may send a carefully crafted packet that causes the Asterisk process to crash. 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 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.