Bug 2565640 - CVE-2026-57191 asterisk: Asterisk: Denial of Service via stack-based buffer overflow in res_pjsip_pubsub [epel-all]
Summary: CVE-2026-57191 asterisk: Asterisk: Denial of Service via stack-based buffer o...
Keywords:
Status: NEW
Alias: None
Product: Fedora EPEL
Classification: Fedora
Component: asterisk
Version: epel10
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: EPEL Packagers SIG
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["b6d71ea8-f205-4217-89e1-b...
Depends On:
Blocks: CVE-2026-57191
TreeView+ depends on / blocked
 
Reported: 2026-11-03 08:40 UTC by Srikanth Balasubramanian
Modified: 2026-11-03 08:40 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:

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Description Srikanth Balasubramanian 2026-11-03 08:40:43 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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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