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TI-2026-74145 Aliases CVE-2026-110654GHSA-pw98-3fpx-6f7v

libzvbi Out-of-Bounds Write via Teletext DRCS convert_drcs

Priority MEDIUM 64CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · Low · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

libzvbi through 0.2.45 contains an out-of-bounds write in its Teletext decoder. Unvalidated DRCS pixel-mode values in X/28/3 packets let a crafted Teletext stream overwrite memory (CWE-787). An attacker can send such a stream to vbi_decode with every slot set to DRCS_MODE_6_5_4, which overflows chars[48][60] in convert_drcs and crashes the application. A public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00168 6th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
zapping-vbilibzvbiup to 0.2.45—No fix listedCNA
  • libzvbi Vendorzapping-vbi Affected up to 0.2.45 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for libzvbi.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-14 Threatist record created from CVE-2026-110654
  2. 2026-10-15 Alias added: GHSA-pw98-3fpx-6f7v
  3. 2026-10-16 Priority changed: MEDIUM → LOW
  4. 2026-10-18 Affected versions changed · Red Hat
  5. 2026-10-18 CVSS score added · Red Hat
  6. 2026-10-20 CISA SSVC decision points changed
  7. 2026-10-20 Priority changed: LOW → MEDIUM

References

Exploit 1

Other 2

  • TI-2025-01908 libzvbi io-sim.c vbi_capture_sim_load_caption integer overflow CVSS 4.0MEDIUM 6.9
  • TI-2025-01906 libzvbi conv.c vbi_strndup_iconv_ucs2 integer overflow CVSS 4.0MEDIUM 6.9
  • TI-2025-01909 libzvbi search.c vbi_search_new integer overflow CVSS 4.0MEDIUM 6.9
  • TI-2025-01905 libzvbi conv.c vbi_strndup_iconv_ucs2 uninitialized pointer CVSS 4.0MEDIUM 6.9
  • TI-2025-01907 libzvbi _vbi_strndup_iconv integer overflow CVSS 4.0MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences