CVE-2026-101103 HMS Networks PEAK-System PCAN Windows drivers Classic Buffer Overflow
Medium 6.8
Published
Updated
Check this codebase for CVE-2026-101103 and fix it if it is affected.
What it is: CVE-2026-101103 is a medium-severity vulnerability in HMS Networks PCAN Windows CAN device drivers, published on 20 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-101103 in the wild and no public exploit code.
Affected product: HMS Networks PCAN Windows CAN device drivers. No package-level version data is available, so check the vendor advisory linked from the reference page.
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/CVE-2026-101103/ (Markdown: https://insights.sbomify.com/CVE-2026-101103/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-101103?
CVE-2026-101103 is a medium-severity vulnerability in HMS Networks PCAN Windows CAN device drivers, published on 20 Oct 2026.
Official description
The PEAK-System PCAN diagnostic call did not validate that the caller-supplied output buffer was large enough to hold the output record.
Weakness: CWE-120
Which versions are affected by CVE-2026-101103?
How do I fix CVE-2026-101103?
No fix has been published for CVE-2026-101103 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-101103 being exploited?
There is no known exploitation of CVE-2026-101103 in the wild and no public exploit code.
Sources
Also known as GHSA-cw79-5c2h-gpr4.