CVE-2026-19029 HDF5 scale-offset filter heap buffer over-read via crafted chunk
An attacker can cause a denial of service via a crafted HDF5 file exploiting a heap buffer over-read in the scale-offset filter.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-19029?
CVE-2026-19029 is a medium-severity memory corruption vulnerability in The HDF Group HDF5, published on 6 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A heap-based buffer over-read in H5Z__filter_scaleoffset() in src/H5Zscaleoffset.c in HDF5 through 2.2.0 lets an 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 holds that many bytes. Both values come from attacker-controlled scale-offset filter parameters in the dataset's filter pipeline message.
Weakness: CWE-125
Which versions are affected by CVE-2026-19029?
How do I fix CVE-2026-19029?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-19029 being exploited?
There is no known exploitation of CVE-2026-19029 in the wild and no public exploit code.
Sources
Also known as AZL-106676, DEBIAN-CVE-2026-19029, ECHO-e273-d299-099c, GHSA-52jg-q5cg-3x56, UBUNTU-CVE-2026-19029.