CVE-2025-2173: A vulnerability was found in libzvbi up to 0.2.43

Q: How do I fix CVE-2025-2173?

zvbi: upgrade to 0.2.44. Exact commands for each OS are on this page.

Q: Is CVE-2025-2173 being exploited?

CVE-2025-2173 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-2173 affect?

CVE-2025-2173 affects zvbi. Severity is medium (CVSS 5.3). 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

Q: How urgent is CVE-2025-2173?

Priority 36/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2025-2173 is a medium-severity flaw (CVSS 5.3) affecting zvbi. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 8def647eea27f7fd7a

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-824, CWE-908
Published	2025-03-11
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: zapping-vbi

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-03-11 07:15 UTCPublished CVE record published
2026-06-17 09:06 UTCUpdated Record last modified

zapping-vbi zvbi UPGRADE

Affected: < 0.2.44

Fixed in: 0.2.44

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy zvbi || rpm -q zvbi || zvbi --version

2. UPGRADE to 0.2.44 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade zvbi

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade zvbi

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-2173?

zvbi: upgrade to 0.2.44. Exact commands for each OS are on this page.

Is CVE-2025-2173 being exploited?

CVE-2025-2173 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-2173 affect?

CVE-2025-2173 affects zvbi. Severity is medium (CVSS 5.3). 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

How urgent is CVE-2025-2173?

Priority 36/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-2177 HIGH 7.3 UPGRADE A vulnerability classified as critical was found in libzvbi up to 0.2.43
CVE-2025-2176 HIGH 7.3 UPGRADE A vulnerability classified as critical has been found in libzvbi up to 0.2.43
CVE-2025-2175 MEDIUM 4.3 UPGRADE A vulnerability was found in libzvbi up to 0.2.43
CVE-2025-2174 MEDIUM 5.3 UPGRADE A vulnerability was found in libzvbi up to 0.2.43

References

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