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Findings

CVE-2026-103222

A vulnerability was determined in Blosc C-Blosc2 up to 3.3.2.

Published Sep 30, 2026 · updated Oct 15, 2026

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.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 30, 2026 · OSV.dev

    Detected

    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 f

  2. Oct 15, 2026 · OSV.dev

    Fix available

    c-blosc2 fixed in 3.3.5-1

  3. Oct 15, 2026 · OSV.dev

    Fix available

    c-blosc2 fixed in 3.3.5-1

  4. Oct 15, 2026 · OSV.dev

    Updated

    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 f

Affected

  • Debian:13 c-blosc22.17.1+ds-1, 2.17.1+ds-2, 2.22.0+ds-1
  • Debian:14 c-blosc20 → 3.3.5-1

Sources

References