Bug 2564896

Summary:	CVE-2026-57199 asterisk: Asterisk: Denial of Service via buffer overflow in SMS dialplan application [fedora-44]
Product:	[Fedora] Fedora	Reporter:	gkamathe
Component:	asterisk	Assignee:	Peter Lemenkov <lemenkov>
Status:	ON_QA ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	44	CC:	bennie.joubert, jsmith.fedora, lemenkov
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["c4a6258b-a6c3-4540-a180-1d5d7d6ae2dc"]}
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2562442

Description gkamathe 2026-11-02 10:01:49 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, `app_sms.c` copies externally controlled `SMS` lengths into `fixed in-struct buffers` without sufficient bounds checks, allowing an attacker to corrupt memory or crash Asterisk. The administrator must explicitly use the `SMS` dialplan application, which is useful when routing calls to or from `analog devices`, and must not have ensured that data passed to the application is valid. 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.

Comment 1 Fedora Update System 2026-11-02 14:52:52 UTC

FEDORA-2026-3e65fe0daf (asterisk-18.26.4-2.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-3e65fe0daf

Comment 2 Fedora Update System 2026-11-03 02:58:08 UTC

FEDORA-2026-3e65fe0daf has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-3e65fe0daf`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-3e65fe0daf

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.