Quick answers
- Is CVE-2026-15418 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-15418 being exploited in the wild.
- How severe is CVE-2026-15418?
- Informational severity, published 10 September 2026.
- Which products and versions are affected?
- Silicon Labs CP210x silabser.sys driver v11.5.0 and earlier.
- Is there a fix for CVE-2026-15418?
- 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-2026-15418 attacked?
- It is attacked with physical access or with local access, in device firmware.
- Am I affected by CVE-2026-15418?
- 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
The vulnerability is an information disclosure (kernel pool memory leak) in the silabser.sys driver that handles CP210x USB serial device communication. A local attacker with physical access can create a malicious CP210x device that transmits malformed packets to trigger the leak. The attack requires no elevated privileges and no network access, only the ability to connect a rogue USB device to the target system. The flaw leaks up to 145 bytes of uninitialized kernel pool memory per exploit instance. Patches are available from Silicon Labs in driver versions after 11.5.0.
Affected products
- Silicon Labs CP210x silabser.sys driver v11.5.0 and earlier
Timeline
- 2026-09-10: disclosed