OSV-2026-21 Use-of-uninitialized-value in processTLSBlock
Not scored
Published
Check this codebase for OSV-2026-21 and fix it if it is affected.
What it is: OSV-2026-21 is a vulnerability in ndpi, published on 9 Jan 2026. 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-2026-21 in the wild and no public exploit code.
Affected packages and fixed versions:
- ndpi (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-2026-21/ (Markdown: https://insights.sbomify.com/OSV-2026-21/index.md)
An attacker can cause a denial of service in the nDPI library by triggering a use-of-uninitialized-value error during TLS block processing.
- 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-2026-21?
OSV-2026-21 is a vulnerability in ndpi, published on 9 Jan 2026. 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=474015854
Crash type: Use-of-uninitialized-value
Crash state:
processTLSBlock
ndpi_search_dtls
ndpi_search_tls_wrapper
Which versions are affected by OSV-2026-21?
1 open source package ship an affected version, including ndpi.
| Package | Affected | Fixed in |
|---|---|---|
ndpi OSS-Fuzz | All versions | None |
How do I fix OSV-2026-21?
No fix has been published for OSV-2026-21 yet. Limit exposure of the affected software until one is available.
Is OSV-2026-21 being exploited?
There is no known exploitation of OSV-2026-21 in the wild and no public exploit code.