CVE-2026-110654: Out-of-bounds Write in zapping-vbi libzvbi
Description
CVE-2026-110654 is an out-of-bounds write vulnerability in libzvbi version 0.2.45 and earlier. It occurs in the Teletext decoder component when processing unvalidated DRCS pixel-mode values in X/28/3 packets. An attacker can craft a Teletext stream that causes a buffer overflow in the convert_drcs function, potentially crashing the application.
CVSS v4.0
Score 6.9medium
Affected software
zapping-vbi
libzvbi
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability exists in libzvbi through version 0.2.45 within the Teletext decoder. Specifically, it arises from an out-of-bounds write triggered by unvalidated DRCS pixel-mode values in X/28/3 packets. By sending a specially crafted Teletext stream with every slot set to DRCS_MODE_6_5_4, the convert_drcs function overflows the chars[48][60] buffer, leading to memory corruption and application crash.
Potential Impact
Successful exploitation can cause memory corruption and crash the affected application. The CVSS 4.0 base score is 6.9 (medium severity), indicating a significant but not critical impact. There is no indication of privilege escalation or remote code execution. The attack requires local vector (AV:L) and user interaction (UI:P).
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Until a patch is available, avoid processing untrusted Teletext streams with libzvbi or apply application-level mitigations to restrict or sanitize input.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-14T13:08:38.678Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6acfa0f72cdf04f65690567e
Added to database: 10/14/2026, 15:34:15 UTC
Last enriched: 10/14/2026, 16:03:32 UTC
Last updated: 10/14/2026, 19:00:32 UTC
Views: 8
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