Description
A vulnerability, which was classified as critical, was found in c-blosc2 up to 2.13.2. Affected is the function ndlz8_decompress of the file /src/c-blosc2/plugins/codecs/ndlz/ndlz8x8.c. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack 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. VDB-259050 is the identifier assigned to this vulnerability.
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-259050 | c-blosc2 ndlz8x8.c ndlz8_decompress heap-based overflow vdb-entry technical-description
- VDB-259050 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- Submit #304556 | blosc c-blosc2 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