What is CVE-2025-2173?

CVE-2025-2173 is a medium-severity vulnerability in Zapping-Vbi Zvbi, classified under Access of Uninitialized Pointer. CVSS score: 5.3/10. Published 2025-03-11.

How severe is CVE-2025-2173?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Zapping-Vbi Zvbi

CVE-2025-2173

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.

Published 2025-03-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Zapping-Vbi Zvbi
Libzvbi — versions 0.2.0, 0.2.1, 0.2.2

Weakness classification (CWE)

References

vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
github.com/zapping-vbi/zvbi/security/advisories/GHSA-g7cg-7gw9-v8cf (related, Patch, Vendor Advisory)
github.com/zapping-vbi/zvbi/commit/8def647eea27f7fd7ad33ff79c2d6d3e39948dce (Patch, patch)
github.com/zapping-vbi/zvbi/releases/tag/v0.2.44 (Release Notes, patch)

Frequently asked questions

What is CVE-2025-2173?: CVE-2025-2173 is a medium-severity vulnerability in Zapping-Vbi Zvbi, classified under Access of Uninitialized Pointer. CVSS score: 5.3/10. Published 2025-03-11.
How severe is CVE-2025-2173?: Medium severity. CVSS v3 base score is 5.3 out of 10.