HDF Group HDF5 up to 2.2.0 Scale-Offset Filter src/H5Zscaleoffset.c H5Z__filter_scaleoffset heap-based overflow

Summaryinfo

A vulnerability was found in HDF Group HDF5 up to 2.2.0. It has been classified as critical. This vulnerability affects the function H5Z__filter_scaleoffset of the file src/H5Zscaleoffset.c of the component Scale-Offset Filter. Performing a manipulation results in heap-based overflow. This vulnerability is known as CVE-2026-19029. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, was found in HDF Group HDF5 up to 2.2.0. This affects the function H5Z__filter_scaleoffset of the file src/H5Zscaleoffset.c of the component Scale-Offset Filter. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A heap-based buffer over-read in H5Z__filter_scaleoffset() in src/H5Zscaleoffset.c in HDF5 through 2.2.0 lets a remote attacker cause a denial of service (application crash) with a crafted HDF5 file. When the stored minimum bits equal the full precision of the datatype, the decoder copies d_nelmts * size bytes from the compressed chunk without checking that the chunk is that large. Both values come from attacker-controlled scale-offset filter parameters in the dataset's filter pipeline message.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-19029 since 08/06/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/07/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-93981). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Database Software

Vendor

• HDF Group

Name

• HDF5

Version

• 2.0
• 2.1
• 2.2.0

License

• free

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

Discussion