Bug 2564840

Summary: CVE-2026-57198 asterisk: Asterisk: Arbitrary code execution via heap buffer overflow in T.140 RED handling [fedora-43]
Product: [Fedora] Fedora Reporter: gkamathe
Component: asteriskAssignee: Peter Lemenkov <lemenkov>
Status: ON_QA --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: 43CC: bennie.joubert, jsmith.fedora, lemenkov
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["b773b9ee-9a58-4755-9184-e2b81d71c473"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:    
Bug Blocks: 2562293    

Description gkamathe 2026-11-02 09:55:39 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. In affected deployments, an authenticated attacker may cause a `T.140 RED` heap buffer overflow using carefully crafted packets, potentially allowing remote code execution or causing Asterisk to crash. The `chan_sip` channel driver must be installed and configured, and its `textsupport` option must be enabled; `textsupport` defaults to no. `The chan_sip driver was deprecated in Asterisk 20 and completely removed in all later versions.` Repository comparisons verify patch containment in Asterisk 20.20.1, 21.12.3, 22.10.1 and 23.4.1, and Certified Asterisk 20.7-cert11 and 22.8-cert3. The affected release-track scope remains unresolved: structured metadata includes later release tracks even though the advisory says the required `chan_sip` driver was removed there.
Comment 1 Fedora Update System 2026-11-02 14:52:44 UTC 
FEDORA-2026-64401a578b (asterisk-18.26.4-2.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-64401a578b
Comment 2 Fedora Update System 2026-11-03 03:16:03 UTC 
FEDORA-2026-64401a578b has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-64401a578b`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-64401a578b

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
Comment 3 Fedora Update System 2026-11-05 16:09:57 UTC 
FEDORA-2026-011a22de5e has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-011a22de5e`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-011a22de5e

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