CVE-2025-2309
published 2025-03-14CVE-2025-2309: 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…
PriorityP346high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.33%
25.4th percentile
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
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | hdf5 | — | — |
| hdfgroup | hdf5 | — | — |
| msrc | azl3_hdf5_1.14.4.3-1_on_azure_linux_3.0 | — | — |
| msrc | azl3_hdf5_1.14.6-1_on_azure_linux_3.0 | — | — |
| msrc | azl3_hdf5_1.14.6-2_on_azure_linux_3.0 | — | — |
| msrc | cbl2_hdf5_1.14.4-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_hdf5_1.14.6-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_hdf5_1.14.6-2_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_libxml2_2.10.0-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_python-lxml_4.9.1-1_on_cbl_mariner_2.0 | — | — |
| msrc | cm1_libxml2_2.9.14-2_on_cbl_mariner_1.0 | — | — |
| msrc | cm1_python-lxml_4.7.1-2_on_cbl_mariner_1.0 | — | — |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv4.04.8MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
nvdv2.04.3MEDIUMAV:L/AC:L/Au:S/C:P/I:P/A:P
osv4.8MEDIUM
vendor_msrc7.5HIGH
vendor_debian4.8LOW
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OSV
CVE-2025-2309: A vulnerability has been found in HDF5 1
osv·2025-03-14·CVSS 4.8
CVE-2025-2309 [MEDIUM] CVE-2025-2309: A vulnerability has been found in HDF5 1
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.
GHSA
GHSA-76vw-8gm2-pwmh: A vulnerability has been found in HDF5 1
ghsa_unreviewed·2025-03-14
CVE-2025-2309 [MEDIUM] CWE-119 GHSA-76vw-8gm2-pwmh: A vulnerability has been found in HDF5 1
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 real existence of this vulnerability is still doubted at the moment. The vendor was contacted early about a batch of vulnerabilities. His response was "reject" without further explanation. We have not received an elaboration even after asking politely for further details. Currently we assume that the vendor wants to "dispute" the entries which is why they are flagged as such until further details become available.
Microsoft
HDF5 Type Conversion Logic H5T__bit_copy heap-based overflow
vendor_msrc·2025-03-11·CVSS 5.3
CVE-2025-2309 [MEDIUM] CWE-122 HDF5 Type Conversion Logic H5T__bit_copy heap-based overflow
HDF5 Type Conversion Logic H5T__bit_copy heap-based overflow
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
VulDB: VulDB
Customer Action Required: Yes
Debian
CVE-2025-2309: hdf5 - A vulnerability has been found in HDF5 1.14.6 and classified as critical. This v...
vendor_debian·2025·CVSS 4.8
CVE-2025-2309 [MEDIUM] CVE-2025-2309: hdf5 - A vulnerability has been found in HDF5 1.14.6 and classified as critical. This v...
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.
Scope: local
bookworm: open
bullseye: open
forky: open
sid: open
trixie: open
Microsoft
NULL Pointer Dereference in lxml/lxml
vendor_msrc·2022-07-12·CVSS 7.5
CVE-2022-2309 [HIGH] CWE-476 NULL Pointer Dereference in lxml/lxml
NULL Pointer Dereference in lxml/lxml
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
@huntrdev: @huntrdev
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: https://learn.microsoft
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2025-03-14
Published