CVE-2026-110654
libzvbi through 0.2.45 Out-of-Bounds Write via Teletext DRCS convert_drcs
- State
- Published
- Severity
- 6.9 Medium
- Published
- Oct 14, 2026
- Updated
- Oct 20, 2026
- Reserved
- Oct 14, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.1 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H | VulnCheck |
Weaknesses
- CWE-787 Out-of-bounds Write
Affected Products
| Product | Versions |
|---|---|
libzvbizapping-vbi |
|
References
- https://hackmd.io/@haind-pwn/zvbi-teletext-drcs-mode-oob-writetechnical-descriptionexploit
- https://github.com/zapping-vbi/zvbi/blob/d3a5ee9f2b047bf16cd1ee5ccf6ec05ee75409d0/src/packet.c#L447technical-description
- https://github.com/zapping-vbi/zvbiproduct
- VulnCheck Advisory: libzvbi through 0.2.45 Out-of-Bounds Write via Teletext DRCS convert_drcsthird-party-advisory
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