Bug 2554391

Summary: CVE-2026-110654 zvbi: zvbi: Denial of Service via out-of-bounds write in Teletext decoder [fedora-all]
Product: [Fedora] Fedora Reporter: Vladimir Vasilev <vvasilev>
Component: zvbiAssignee: Hans de Goede <hans>
Status: ON_QA --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: dmitry, hans, mchehab, xavier
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["60ace68e-aee5-44a9-befb-c66e156b50da"]}
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
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: 2552379    

Description Vladimir Vasilev 2026-10-16 18:45:06 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.

libzvbi through 0.2.45 contains an out-of-bounds write vulnerability in the Teletext decoder that allows attackers to corrupt memory by supplying unvalidated DRCS pixel-mode values in X/28/3 packets. Attackers can send a crafted Teletext stream decoded via vbi_decode with every slot set to DRCS_MODE_6_5_4, causing convert_drcs to overflow chars[48][60] and crash the application.

Comment 1 Fedora Update System 2026-10-28 17:10:32 UTC
FEDORA-EPEL-2026-f52de6b5f1 (zvbi-0.2.46-1.el10_4) has been submitted as an update to Fedora EPEL 10.4.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-f52de6b5f1

Comment 2 Fedora Update System 2026-10-28 17:10:32 UTC
FEDORA-2026-887bf17d25 (zvbi-0.2.46-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-887bf17d25

Comment 3 Fedora Update System 2026-10-28 17:10:38 UTC
FEDORA-EPEL-2026-c9e133d04a (zvbi-0.2.46-1.el10_3) has been submitted as an update to Fedora EPEL 10.3.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-c9e133d04a

Comment 4 Fedora Update System 2026-10-28 17:10:38 UTC
FEDORA-2026-eb3f957b9e (zvbi-0.2.46-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-eb3f957b9e

Comment 5 Fedora Update System 2026-10-28 17:10:48 UTC
FEDORA-2026-055ec4753d (zvbi-0.2.46-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-055ec4753d

Comment 6 Fedora Update System 2026-10-29 01:39:21 UTC
FEDORA-EPEL-2026-c9e133d04a has been pushed to the Fedora EPEL 10.3 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-c9e133d04a

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

Comment 7 Fedora Update System 2026-10-29 02:01:27 UTC
FEDORA-2026-eb3f957b9e 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-eb3f957b9e`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-eb3f957b9e

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

Comment 8 Fedora Update System 2026-10-29 02:12:09 UTC
FEDORA-EPEL-2026-f52de6b5f1 has been pushed to the Fedora EPEL 10.4 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-f52de6b5f1

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

Comment 9 Fedora Update System 2026-10-29 02:21:59 UTC
FEDORA-2026-887bf17d25 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-2026-887bf17d25`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-887bf17d25

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

Comment 10 Fedora Update System 2026-10-29 02:47:51 UTC
FEDORA-2026-055ec4753d 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-2026-055ec4753d`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-055ec4753d

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