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Vulnerability · Published Mar 14, 2025 · Assigned by VulDB

CVE-2025-2309HDF5 Type Conversion Logic H5T__bit_copy heap-based overflow

Medium 5.3

In plain English

A medium-severity heap buffer overflow in HDF5. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.4%top 69.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

A vulnerability has been found in HDF5 1.14.6 and classified as critical. This vulnerability affects the function H5T__bit_copy of the component Type Conversion Logic. The manipulation leads to heap-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The vendor plans to fix this issue in an upcoming release.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12hdf5no fix listedDEBIAN-CVE-2025-2309
Debian:13hdf5no fix listedDEBIAN-CVE-2025-2309
Debian:14hdf5no fix listedDEBIAN-CVE-2025-2309
Ubuntu:22.04:LTShdf5no fix listedUBUNTU-CVE-2025-2309
Ubuntu:24.04:LTShdf5no fix listedUBUNTU-CVE-2025-2309
Ubuntu:25.10hdf5no fix listedUBUNTU-CVE-2025-2309
Ubuntu:26.04:LTShdf5no fix listedUBUNTU-CVE-2025-2309
Ubuntu:26.10hdf5no fix listedUBUNTU-CVE-2025-2309

Affected products (as reported)

VendorProductVersions
n/a HDF5 1.14.6

Weakness: CWE-122, CWE-119 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

References