CVE-2025-2173 libzvbi conv.c vbi_strndup_iconv_ucs2 uninitialized pointer

What is CVE-2025-2173?

CVE-2025-2173 is a medium-severity vulnerability in libzvbi, published on 11 Mar 2025.

Official description

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.

Weakness: CWE-908, CWE-824

Which versions are affected by CVE-2025-2173?

It affects 1 product.

Products include Zapping-Vbi Zvbi.

How do I fix CVE-2025-2173?

Upgrade to a fixed version.

Is CVE-2025-2173 being exploited?

There is no known exploitation of CVE-2025-2173 in the wild and no public exploit code.

Other vulnerabilities in libzvbi

• CVE-2025-2174 libzvbi conv.c vbi_strndup_iconv_ucs2 integer overflow Medium 6.9
• CVE-2025-2176 libzvbi io-sim.c vbi_capture_sim_load_caption integer overflow Medium 6.9
• CVE-2025-2177 libzvbi search.c vbi_search_new integer overflow Medium 6.9
• CVE-2025-2175 libzvbi _vbi_strndup_iconv integer overflow Medium 5.3

Sources

• CVE record
• NVD
• OSV
• How this page is made

Also known as DEBIAN-CVE-2025-2173, OESA-2025-1329, OESA-2025-1331, OESA-2025-1332, UBUNTU-CVE-2025-2173.