CVE-2025-6856

HDF5 H5FL.c H5FL__reg_gc_list use after free

CVE-2025-6856 is fixed in hdf5 on 1 platform by DEBIAN-CVE-2025-6856 (version 2.1.0+repack-1), released June 29, 2025. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.8

high

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0025

17th percentile

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.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
hdf5 · Debian 14	2.1.0+repack-1	DEBIAN-CVE-2025-6856	Jun 29, 2025

Details

Published
June 29, 2025
Weakness
Use After Free
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-6856

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