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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | 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, 0.2.3… | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | zvbi | 0.2.44-1 | — |
| Debian 13 | zvbi | 0.2.44-1 | — |
| Debian 12 | zvbi | 0.2.41-1+deb12u1 | — |
| Debian 11 | zvbi | 0.2.35-18+deb11u1 | DLA-4449-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | zvbi | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | zvbi | 0.2.42-2ubuntu0.24.04.1~esm1 | USN-7367-1 |
| Ubuntu Pro 22.04 LTS | zvbi | 0.2.35-19ubuntu0.1~esm1 | USN-7367-1 |
| Ubuntu Pro 20.04 LTS | zvbi | 0.2.35-17ubuntu0.1~esm1 | USN-7367-1 |
| Ubuntu Pro 18.04 LTS | zvbi | 0.2.35-13ubuntu0.1~esm1 | USN-7367-1 |
| Ubuntu Pro 16.04 LTS | zvbi | 0.2.35-10ubuntu0.1~esm1 | USN-7367-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | zvbi | 0.2.35-150000.4.3.1 | SUSE-SU-2025:0979-1 |
| SLES 15 SP5 | zvbi | 0.2.35-150000.4.3.1 | SUSE-SU-2025:0979-1 |
| SLES 15 SP4 | zvbi | 0.2.35-150000.4.3.1 | SUSE-SU-2025:0979-1 |
| SLES 12 SP5 | zvbi | 0.2.35-3.3.1 | SUSE-SU-2025:0988-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP5 | zvbi | 0.2.35-150000.4.3.1 | SUSE-SU-2025:0979-1 |
| SLES for SAP 15 SP4 | zvbi | 0.2.35-150000.4.3.1 | SUSE-SU-2025:0979-1 |
| SLE HPC 15 SP5 | zvbi | 0.2.35-150000.4.3.1 | SUSE-SU-2025:0979-1 |
| SLE HPC 15 SP4 | zvbi | 0.2.35-150000.4.3.1 | SUSE-SU-2025:0979-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | zvbi | 0.2.44-1.1 | openSUSE-SU-2025:14891-1 |
| openSUSE Leap 15.6 | zvbi | 0.2.35-150000.4.3.1 | SUSE-SU-2025:0979-1 |
Advisories 5
- USN-7367-1 zvbi vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- openSUSE-SU-2025:14891-1 libzvbi-chains0-0.2.44-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0988-1 Security update for zvbi SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0979-1 Security update for zvbi SUSE / openSUSE Security Updates · Feb 4, 2026
- DLA-4449-1 zvbi - security update Debian Security (DSA / DLA) · Jan 24, 2026
References
- VDB-299202 | libzvbi conv.c vbi_strndup_iconv_ucs2 uninitialized pointer vdb-entry technical-description
- VDB-299202 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- Submit #512798 | Open Source libzvbi 0.2.43 Unitinialized Heap Read third-party-advisory
- https://github.com/zapping-vbi/zvbi/security/advisories/GHSA-g7cg-7gw9-v8cf related
- https://github.com/zapping-vbi/zvbi/commit/8def647eea27f7fd7ad33ff79c2d6d3e39948dce patch
- https://github.com/zapping-vbi/zvbi/releases/tag/v0.2.44 patch