CVE-2025-6856

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.

CVSS v3.1 Score

3.3

LOW

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

Weakness Type (CWE)

CWE-119 Buffer Overflow

CWE-416 Use After Free

Affected Products

Vendor	Product	Versions
hdfgroup	hdf5	All

References

Exploits

https://github.com/HDFGroup/hdf5/issues/5574 https://github.com/user-attachments/files/20623417/hdf5_crash_6.txt

Other References

https://vuldb.com/?ctiid.314328 https://vuldb.com/?id.314328 https://vuldb.com/?submit.602528

Frequently Asked Questions

What is CVE-2025-6856? +

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. It has a CVSS v3.1 base score of 3.3 (LOW).

How severe is CVE-2025-6856? +

CVE-2025-6856 has a CVSS v3.1 score of 3.3 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

What products are affected by CVE-2025-6856? +

CVE-2025-6856 affects products from hdfgroup, specifically: hdf5. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-6856? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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