OSV-2026-55 Use-of-uninitialized-value in vp9_quantize_fp_avx2
Not scored
Published
Check this codebase for OSV-2026-55 and fix it if it is affected.
What it is: OSV-2026-55 is a vulnerability in libvpx, published on 15 Jan 2026.
Exploitation: There is no known exploitation of OSV-2026-55 in the wild and no public exploit code.
Affected packages and fixed versions:
- libvpx (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-2026-55/ (Markdown: https://insights.sbomify.com/OSV-2026-55/index.md)
An uninitialized value in the VP9 AVX2 quantization function can cause a crash, potentially leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2026-55?
OSV-2026-55 is a vulnerability in libvpx, published on 15 Jan 2026.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=475583924
Crash type: Use-of-uninitialized-value
Crash state:
vp9_quantize_fp_avx2
block_yrd
vp9_pick_inter_mode
Which versions are affected by OSV-2026-55?
1 open source package ship an affected version, including libvpx.
| Package | Affected | Fixed in |
|---|---|---|
libvpx OSS-Fuzz | All versions | None |
How do I fix OSV-2026-55?
No fix has been published for OSV-2026-55 yet. Limit exposure of the affected software until one is available.
Is OSV-2026-55 being exploited?
There is no known exploitation of OSV-2026-55 in the wild and no public exploit code.