Bug 2558420

Summary: CVE-2026-94300 bind: bind: Arbitrary code execution via GSS-TSIG UDP message replay [fedora-all]
Product: [Fedora] Fedora Reporter: Marco Benatto <mbenatto>
Component: bindAssignee: Petr Menšík <pemensik>
Status: ON_QA --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: anon.amish, dns-sig, mruprich, pemensik, zdohnal
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["c0cca438-0b7a-4fa2-81d9-23704f761425"]}
Fixed In Version: Doc Type: ---
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Clone Of: Environment:
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Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2556407    

Description Marco Benatto 2026-10-21 17:58:46 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.

Replaying GSS-TSIG signed UDP messages can result in memory corruption in "named". An attacker who can capture a previously signed UDP message can replay it while the negotiated TSIG key is still valid. By also sending crafted queries to a zone the attacker controls, the attacker may potentially achieve remote code execution.

Comment 1 Fedora Update System 2026-11-05 18:50:58 UTC
FEDORA-2026-7198802985 (bind-9.18.51^git20261102.973d8646-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-7198802985

Comment 2 Fedora Update System 2026-11-05 18:51:11 UTC
FEDORA-2026-cf9d4ec5e6 (bind-9.18.51^git20261102.973d8646-3.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-cf9d4ec5e6

Comment 3 Fedora Update System 2026-11-06 03:13:13 UTC
FEDORA-2026-cf9d4ec5e6 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-cf9d4ec5e6`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-cf9d4ec5e6

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

Comment 4 Fedora Update System 2026-11-06 18:17:56 UTC
FEDORA-2026-7198802985 has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-7198802985`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-7198802985

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