OSV-2021-820 UNKNOWN READ in virtio_gpu_disable_scanout
Not scored
Published
Check this codebase for OSV-2021-820 and fix it if it is affected.
What it is: OSV-2021-820 is a vulnerability in qemu, published on 2 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of OSV-2021-820 in the wild and no public exploit code.
Affected packages and fixed versions:
- qemu (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-2021-820/ (Markdown: https://insights.sbomify.com/OSV-2021-820/index.md)
An unknown read vulnerability in the virtio-gpu scanout disable function allows attackers to potentially disclose sensitive memory contents.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2021-820?
OSV-2021-820 is a vulnerability in qemu, published on 2 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=34831
Crash type: UNKNOWN READ
Crash state:
virtio_gpu_disable_scanout
virtio_gpu_set_scanout
virtio_gpu_simple_process_cmd
Which versions are affected by OSV-2021-820?
1 open source package ship an affected version, including qemu.
| Package | Affected | Fixed in |
|---|---|---|
qemu OSS-Fuzz | All versions | None |
How do I fix OSV-2021-820?
No fix has been published for OSV-2021-820 yet. Limit exposure of the affected software until one is available.
Is OSV-2021-820 being exploited?
There is no known exploitation of OSV-2021-820 in the wild and no public exploit code.