Bug 2552379 (CVE-2026-110654)

Summary: CVE-2026-110654 zvbi: zvbi: Denial of Service via out-of-bounds write in Teletext decoder
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in zvbi. An out-of-bounds write vulnerability in the Teletext decoder allows an attacker to cause a Denial of Service (DoS) and memory corruption by supplying a specially crafted Teletext stream. When the application decodes the malicious stream containing unvalidated Dynamically Redefinable Character Set (DRCS) pixel-mode values, an internal buffer overflows, causing the application to crash.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2554390, 2554391    
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Description OSIDB Bzimport 2026-10-14 15:31:48 UTC
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.