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.

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Access Vector Local

Access Complexity Low

Authentication Single

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

Exploitation poc

Automatable no

Technical Impact partial

Affected Vendors & Products

No data.

No data.

No data.

References
Link Providers
https://github.com/HDFGroup/hdf5/issues/5574 cve-icon cve-icon cve-icon
https://github.com/user-attachments/files/20623417/hdf5_crash_6.txt cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-6856 cve-icon
https://vuldb.com/?ctiid.314328 cve-icon cve-icon cve-icon
https://vuldb.com/?id.314328 cve-icon cve-icon cve-icon
https://vuldb.com/?submit.602528 cve-icon cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-6856 cve-icon
History

Mon, 30 Jun 2025 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 30 Jun 2025 12:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 threat_severity

Low

Sun, 29 Jun 2025 09:45:00 +0000

Type Values Removed Values Added
Description 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.
Title HDF5 H5FL.c H5FL__reg_gc_list use after free
Weaknesses CWE-119
CWE-416
References
Metrics cvssV2_0

{'score': 1.7, 'vector': 'AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 3.3, 'vector': 'CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 3.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 4.8, 'vector': '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'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2025-06-29T09:31:05.927Z

Updated: 2025-06-30T16:02:47.962Z

Reserved: 2025-06-28T10:42:51.429Z

Link: CVE-2025-6856

cve-icon Vulnrichment

Updated: 2025-06-30T16:02:40.340Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-06-29T10:15:21.443

Modified: 2025-06-30T18:38:23.493

Link: CVE-2025-6856

cve-icon Redhat

Severity : Low

Publid Date: 2025-06-29T09:31:05Z

Links: CVE-2025-6856 - Bugzilla