CVE-2025-6856

1.9 lowEPSS 0.2%

Low (1.9) in hdfgroup hdf5. EPSS 0.2% chance of exploitation in the next 30 days.

A vulnerability, which was classified as problematic, was found in HDF5 1.14.6. Affected is the function H5FL__reg_gc_list of the file src/H5FL.c. The manipulation leads to use after free. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used.

Severity

CVSS 4.0

1.9 low

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

CVSS 3.1

7.8 high

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 16% of CVEs (scores of 2026-10-31)
CWEs: CWE-119, CWE-416
Published: 2025-06-29
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

hdfgroup:hdf5

References

https://github.com/HDFGroup/hdf5/issues/5574
https://github.com/user-attachments/files/20623417/hdf5_crash_6.txt
https://vuldb.com/?ctiid.314328
https://vuldb.com/?id.314328
https://vuldb.com/?submit.602528

Check your stack JSON