CVE-2020-29367: Blosc C-BLOSC2

High severity, CVSS 7.8. EPSS: 1.2% chance of exploitation in the next 30 days.

blosc2.c in Blosc C-Blosc2 through 2.0.0.beta.5 has a heap-based buffer overflow when there is a lack of space to write compressed data.

Affected products

• Blosc C-BLOSC2: version 2.0.0 only

Published 2020-11-27. Last modified 2026-06-17.