OSV-2025-955 Use-of-uninitialized-value in decoder_context::construct_reference_picture_lists
Not scored
Published
Check this codebase for OSV-2025-955 and fix it if it is affected.
What it is: OSV-2025-955 is a vulnerability in kimageformats, published on 29 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of OSV-2025-955 in the wild and no public exploit code.
Affected packages and fixed versions:
- kimageformats (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-2025-955/ (Markdown: https://insights.sbomify.com/OSV-2025-955/index.md)
An attacker can trigger a use-of-uninitialized-value bug in the video decoder, potentially leading to information disclosure or crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2025-955?
OSV-2025-955 is a vulnerability in kimageformats, published on 29 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=464323256
Crash type: Use-of-uninitialized-value
Crash state:
decoder_context::construct_reference_picture_lists
decoder_context::process_slice_segment_header
decoder_context::read_slice_NAL
Which versions are affected by OSV-2025-955?
1 open source package ship an affected version, including kimageformats.
| Package | Affected | Fixed in |
|---|---|---|
kimageformats OSS-Fuzz | All versions | None |
How do I fix OSV-2025-955?
No fix has been published for OSV-2025-955 yet. Limit exposure of the affected software until one is available.
Is OSV-2025-955 being exploited?
There is no known exploitation of OSV-2025-955 in the wild and no public exploit code.