Bug 2565372 (CVE-2026-57191) - CVE-2026-57191 asterisk: Asterisk: Denial of Service via stack-based buffer overflow in res_pjsip_pubsub
Summary: CVE-2026-57191 asterisk: Asterisk: Denial of Service via stack-based buffer o...
Keywords:
Status: NEW
Alias: CVE-2026-57191
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2565640 2565641
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-02 19:57 UTC by OSIDB Bzimport
Modified: 2026-11-03 08:40 UTC (History)
0 users

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Description OSIDB Bzimport 2026-11-02 19:57:09 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 unbounded `sscanf` in `res_pjsip_pubsub` when parsing the `MWI NOTIFY` `Message-Account` field may allow an unauthenticated attacker to send a carefully crafted packet that causes a stack buffer overflow and corrupts the underlying transport, permanently disabling all SIP functionality. An Asterisk restart is required to restore full operation. 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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