What’s Vulnerable › Vulnerabilities

CVE-2025-6818: HDF5 H5Ochunk.c H5O__chunk_protect heap-based overflow

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-06-28 · updated 2026-06-17
• Weakness: CWE-119

Description

A vulnerability, which was classified as problematic, was found in HDF5 1.14.6. Affected is the function H5O__chunk_protect of the file /src/H5Ochunk.c. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed to the public and may be used.

Affected products

• HDF5: 1.14.6

References

• https://github.com/HDFGroup/hdf5/issues/5573
• https://github.com/user-attachments/files/20623382/hdf5_crash_5.txt
• https://vuldb.com/?ctiid.314256
• https://vuldb.com/?id.314256
• https://vuldb.com/?submit.602326
• https://github.com/HDFGroup/hdf5/issues/5573

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