# CVE-2026-103222: c-blosc2: A vulnerability was determined in Blosc C-Blosc2 up to 3.3.2

CVE-2026-103222 is fixed in c-blosc2 on 1 platform by DEBIAN-CVE-2026-103222 (version 3.3.5-1), released October 16, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-103222
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0028
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 30, 2026

## Description

A vulnerability was determined in Blosc C-Blosc2 up to 3.3.2. This impacts the function blosclz_decompress of the file blosc/blosclz.c of the component blosclz Decompression. Executing a manipulation can lead to integer overflow. The attack may be launched remotely. A high complexity level is associated with this attack. The exploitability is said to be difficult. Upgrading to version 3.3.3 will fix this issue. This patch is called fe2964d114d97847f56570a0ab2be2c57ccbeedc. The affected component should be upgraded.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | c-blosc2 Debian 14 | 3.3.5-1 | [DEBIAN-CVE-2026-103222](https://patchblox.com/security/data/fix/linux/debian-cve-2026-103222.md) | Oct 16, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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