What’s Vulnerable › Vulnerabilities
CVE-2026-17573: Double Free in H5D__chunk_copy() in HDF5 via a Crafted Chunk-Index Size Field
- Severity: medium (CVSS 5.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2026-07-27 · updated 2026-10-24
- Weakness: CWE-415
Description
A double free vulnerability was discovered in the HDF5 library. Processing a crafted HDF5 file containing an oversized chunk size field via h5repack may cause the application to abort due to a double free.
Affected products
- HDF5: before 2.2.0 — fixed in 2.2.0
How to fix
Upgrade to a fixed version: HDF5 2.2.0. Check the vendor advisory for mitigations.
References
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