OSV-2026-582 Use-of-uninitialized-value in H5S_select_hyperslab
Not scored
Published
Check this codebase for OSV-2026-582 and fix it if it is affected.
What it is: OSV-2026-582 is a vulnerability in matio, published on 17 Apr 2026.
Exploitation: There is no known exploitation of OSV-2026-582 in the wild and no public exploit code.
Affected packages and fixed versions:
- matio (OSS-Fuzz): affected all versions; no fix listed
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/OSV-2026-582/ (Markdown: https://insights.sbomify.com/OSV-2026-582/index.md)
An attacker can cause a denial of service in the HDF5 library by triggering a use-of-uninitialized-value error during hyperslab selection.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2026-582?
OSV-2026-582 is a vulnerability in matio, published on 17 Apr 2026.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=502905691
Crash type: Use-of-uninitialized-value
Crash state:
H5S_select_hyperslab
H5D__chunk_io_init
H5D__read
Which versions are affected by OSV-2026-582?
1 open source package ship an affected version, including matio.
| Package | Affected | Fixed in |
|---|---|---|
matio OSS-Fuzz | All versions | None |
How do I fix OSV-2026-582?
No fix has been published for OSV-2026-582 yet. Limit exposure of the affected software until one is available.
Is OSV-2026-582 being exploited?
There is no known exploitation of OSV-2026-582 in the wild and no public exploit code.