# CVE-2026-15417: Silicon Labs CP210x silabser.sys kernel crash via incorrect driver settings

Source: https://junglewise.ai/threats/cve-2026-15417-silicon-labs-cp210x-silabser-sys-kernel-crash-via-incorrect  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-10. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-15417 · Severity: info · Published 2026-09-10

The silabser.sys Windows driver for CP210x USB-to-serial devices contains a vulnerability that allows any local user to crash the Windows kernel by configuring incorrect driver settings. This denial-of-service condition could cause unexpected system downtime or be used as a foothold for privilege escalation attacks in multi-user environments.

Vendors: [Silicon Labs](https://junglewise.ai/threats/vendors/silicon-labs).

## Quick answers

**Is CVE-2026-15417 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-15417 being exploited in the wild.

**How severe is CVE-2026-15417?** Informational severity, published 10 September 2026.

**Which products and versions are affected?** Silicon Labs CP210x silabser.sys driver Windows 8.

**Is there a fix for CVE-2026-15417?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-15417 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-15417?** Check whether you run Silicon Labs CP210x silabser.sys driver at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This is a denial-of-service vulnerability in the silabser.sys kernel driver for CP210x serial devices under Windows 8. An unprivileged local user can trigger a kernel crash by supplying malformed or out-of-range parameters to the driver. No special privileges or code execution capability is required—only local access and the ability to interact with the driver interface. The vulnerability allows an attacker to cause a kernel panic, resulting in system unavailability. The issue has been reported to Silicon Labs and patches may be available through driver updates.

## Affected products

- Silicon Labs CP210x silabser.sys driver Windows 8

## Timeline

- 2026-09-10: disclosed

## References

- [https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/069Vm0000100HA6IAM?operationContext=S1](https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/069Vm0000100HA6IAM?operationContext=S1)

## Related threats

- [Silicon Labs CP210x silabser.sys information leak in kernel pool memory](https://junglewise.ai/threats/cve-2026-15418-silicon-labs-cp210x-silabser-sys-information-leak-in-kernel-pool)