Description
A vulnerability has been found in c-blosc2 up to 2.13.2 and classified as critical. Affected by this vulnerability is the function ndlz4_decompress of the file /src/c-blosc2/plugins/codecs/ndlz/ndlz4x4.c. The manipulation leads to heap-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 2.14.3 is able to address this issue. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-259051.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | c-blosc2 | 2.13.0, 2.13.1, 2.13.2 | — |
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 | c-blosc2 | 2.13.1+ds-3 | — |
| Debian 13 | c-blosc2 | 2.13.1+ds-3 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | c-blosc2 | No fix yet | — |
| Ubuntu 26.04 LTS | c-blosc2 | No fix yet | — |
| Ubuntu 25.10 | c-blosc2 | No fix yet | — |
| Ubuntu 24.04 LTS | c-blosc2 | No fix yet | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | blosc | No fix yet | — |
References
- VDB-259051 | c-blosc2 ndlz4x4.c ndlz4_decompress heap-based overflow vdb-entry technical-description
- VDB-259051 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- Submit #304557 | blosc c-blosc2 commit 1dd1e55cb329d01c210da77ceb53027853c35b72 heap-buffer-overflow third-party-advisory
- https://drive.google.com/drive/folders/1T1k3UeS09m65LjVXExUuZfedNQPWQWCo?usp=sharing exploit
- https://github.com/Blosc/c-blosc2/releases/tag/v2.14.3 patch