High severity · published Jun 28, 2025
CVE-2025-6818
HDF5 H5Ochunk.c H5O__chunk_protect heap-based overflow
7.8
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HD
HDF5 ·
1.14.6 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-6818
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-6818
Exploit
https://github.com/HDFGroup/hdf5/issues/5573
Exploit
https://github.com/user-attachments/files/20623382/hdf5_crash_5.txt
Permissions Required
https://vuldb.com/?ctiid.314256
Third Party Advisory
https://vuldb.com/?id.314256
Third Party Advisory
https://vuldb.com/?submit.602326
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