CVE-2025-6516
published 2025-06-23CVE-2025-6516: A vulnerability has been found in HDF5 up to 1.14.6 and classified as critical. This vulnerability affects the function H5F_addr_decode_len of the file…
PriorityP347high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.31%
22.8th percentile
A vulnerability has been found in HDF5 up to 1.14.6 and classified as critical. This vulnerability affects the function H5F_addr_decode_len of the file /hdf5/src/H5Fint.c. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed to the public and may be used.
Affected
18 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | hdf5 | — | — |
| hdfgroup | hdf5 | <= 1.14.6 | — |
| hdfgroup | hdf5 | — | — |
| hdfgroup | hdf5 | — | — |
| hdfgroup | hdf5 | — | — |
| hdfgroup | hdf5 | — | — |
| hdfgroup | hdf5 | — | — |
| hdfgroup | hdf5 | — | — |
| hdfgroup | hdf5 | — | — |
| msrc | azl3_bind_9.16.44-2_on_azure_linux_3.0 | — | — |
| msrc | azl3_bind_9.19.21-1_on_azure_linux_3.0 | — | — |
| msrc | azl3_hdf5_1.14.4.3-1_on_azure_linux_3.0 | — | — |
| msrc | azure_linux_3.0_arm | — | — |
| msrc | azure_linux_3.0_x64 | — | — |
| msrc | cbl2_bind_9.16.50-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_hdf5_1.14.4-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
| msrc | cbl_mariner_2.0_x64 | — | — |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv4.01.9LOWCVSS: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:P/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
vendor_redhat4.8MEDIUM
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OSV
CVE-2025-6516: A vulnerability has been found in HDF5 up to 1
osv·2025-06-23·CVSS 4.8
CVE-2025-6516 [MEDIUM] CVE-2025-6516: A vulnerability has been found in HDF5 up to 1
A vulnerability has been found in HDF5 up to 1.14.6 and classified as critical. This vulnerability affects the function H5F_addr_decode_len of the file /hdf5/src/H5Fint.c. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed to the public and may be used.
GHSA
GHSA-r9x6-p32f-jfm3: A vulnerability has been found in HDF5 up to 1
ghsa_unreviewed·2025-06-23
CVE-2025-6516 [MEDIUM] CWE-119 GHSA-r9x6-p32f-jfm3: A vulnerability has been found in HDF5 up to 1
A vulnerability has been found in HDF5 up to 1.14.6 and classified as critical. This vulnerability affects the function H5F_addr_decode_len of the file /hdf5/src/H5Fint.c. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed to the public and may be used.
Red Hat
hdf5: HDF5 heap-based overflow
vendor_redhat·2025-06-23·CVSS 4.8
CVE-2025-6516 [MEDIUM] CWE-119 hdf5: HDF5 heap-based overflow
hdf5: HDF5 heap-based overflow
A vulnerability has been found in HDF5 up to 1.14.6 and classified as critical. This vulnerability affects the function H5F_addr_decode_len of the file /hdf5/src/H5Fint.c. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed to the public and may be used.
A heap-based buffer overflow was found in HDF5. This flaw exists in the H5F_addr_decode_len function of the /hdf5/src/H5Fint.c file and may be triggered by input manipulation to the function. Local access is required to exploit this flaw.
Mitigation: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability
Microsoft
HDF5 H5Fint.c H5F_addr_decode_len heap-based overflow
vendor_msrc·2025-06-10·CVSS 5.3
CVE-2025-6516 [MEDIUM] CWE-122 HDF5 H5Fint.c H5F_addr_decode_len heap-based overflow
HDF5 H5Fint.c H5F_addr_decode_len 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-2025-6516: hdf5 - A vulnerability has been found in HDF5 up to 1.14.6 and classified as critical. ...
vendor_debian·2025·CVSS 4.8
CVE-2025-6516 [MEDIUM] CVE-2025-6516: hdf5 - A vulnerability has been found in HDF5 up to 1.14.6 and classified as critical. ...
A vulnerability has been found in HDF5 up to 1.14.6 and classified as critical. This vulnerability affects the function H5F_addr_decode_len of the file /hdf5/src/H5Fint.c. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed to the public and may be used.
Scope: local
bookworm: open
bullseye: open
forky: open
sid: open
trixie: open
Microsoft
Specific recursive query patterns may lead to an out-of-memory condition
vendor_msrc·2024-02-13·CVSS 7.5
CVE-2023-6516 [HIGH] CWE-770 Specific recursive query patterns may lead to an out-of-memory condition
Specific recursive query patterns may lead to an out-of-memory condition
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
isc: isc
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference:
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2025-6516 python-hdf5storage: HDF5 heap-based overflow [fedora-42]
bugzilla·2025-06-23·CVSS 1.9
CVE-2025-6516 [LOW] CVE-2025-6516 python-hdf5storage: HDF5 heap-based overflow [fedora-42]
CVE-2025-6516 python-hdf5storage: HDF5 heap-based overflow [fedora-42]
More information about this security flaw is available in the following bug:
https://bugzilla.redhat.com/show_bug.cgi?id=2374364
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
'version' of '42'.
Package Maintaine
Bugzilla
CVE-2025-6516 hdf5: HDF5 heap-based overflow [fedora-42]
bugzilla·2025-06-23·CVSS 1.9
CVE-2025-6516 [LOW] CVE-2025-6516 hdf5: HDF5 heap-based overflow [fedora-42]
CVE-2025-6516 hdf5: HDF5 heap-based overflow [fedora-42]
More information about this security flaw is available in the following bug:
https://bugzilla.redhat.com/show_bug.cgi?id=2374364
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
'version' of '42'.
Package Maintainer: If you wish
2025-06-23
Published