What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-03-11 · updated 2026-06-17
• Weakness: CWE-824

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.

Affected products

• libzvbi: before 0.2.44 — fixed in 0.2.44

How to fix

Upgrade to a fixed version: libzvbi 0.2.44. Check the vendor advisory for mitigations.

References

• https://github.com/zapping-vbi/zvbi/commit/8def647eea27f7fd7ad33ff79c2d6d3e39948dce
• https://github.com/zapping-vbi/zvbi/releases/tag/v0.2.44
• https://github.com/zapping-vbi/zvbi/security/advisories/GHSA-g7cg-7gw9-v8cf
• https://vuldb.com/?ctiid.299202
• https://vuldb.com/?id.299202
• https://vuldb.com/?submit.512798

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