TI-2025-01905 Aliases CVE-2025-2173

libzvbi conv.c vbi_strndup_iconv_ucs2 uninitialized pointer

LOW 37CWE-824Published 2025-03-11 · Updated 2025-03-11

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Information disclosure
Confidentiality · integrity · availability: Low · None · None
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-908 and the CVSS impact.

Summary

A vulnerability was found in libzvbi up to 0.2.43. It has been classified as problematic. Affected is the function vbi_strndup_iconv_ucs2 of the file src/conv.c. The manipulation of the argument src_length leads to uninitialized pointer. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 0.2.44 is able to address this issue. The patch is identified as 8def647eea27f7fd7ad33ff79c2d6d3e39948dce. It is recommended to upgrade the affected component. The code maintainer was informed beforehand about the issues. She reacted very fast and highly professional.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00615 49th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	libzvbi	0.2.0; 0.2.1; 0.2.2; 0.2.3; 0.2.4; 0.2.5; 0.2.6; 0.2.7; 0.2.8; 0.2.9; 0.2.10; 0.2.11; 0.2.12; 0.2.13; 0.2.14; 0.2.15; 0.2.16; 0.2.17; 0.2.18; 0.2.19; 0.2.20; 0.2.21; 0.2.22; 0.2.23; 0.2.24; 0.2.25; 0.2.26; 0.2.27; 0.2.28; 0.2.29; 0.2.30; 0.2.31; 0.2.32; 0.2.33; 0.2.34; 0.2.35; 0.2.36; 0.2.37; 0.2.38; 0.2.39; 0.2.40; 0.2.41; 0.2.42; 0.2.43	—	No fix listed	CNA

libzvbi Vendor— Affected 0.2.0; 0.2.1; 0.2.2; 0.2.3; 0.2.4; 0.2.5; 0.2.6; 0.2.7; 0.2.8; 0.2.9; 0.2.10; 0.2.11; 0.2.12; 0.2.13; 0.2.14; 0.2.15; 0.2.16; 0.2.17; 0.2.18; 0.2.19; 0.2.20; 0.2.21; 0.2.22; 0.2.23; 0.2.24; 0.2.25; 0.2.26; 0.2.27; 0.2.28; 0.2.29; 0.2.30; 0.2.31; 0.2.32; 0.2.33; 0.2.34; 0.2.35; 0.2.36; 0.2.37; 0.2.38; 0.2.39; 0.2.40; 0.2.41; 0.2.42; 0.2.43 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:zapping-vbi:zvbi::::::::	before 0.2.44	Vulnerable	zapping-vbi

cpe:2.3:a:zapping-vbi:zvbi:*:*:*:*:*:*:*:* Versions before 0.2.44 Vulnerable ·zapping-vbi

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-2173

References

Patch 3

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-2025-01907 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