CVE-2026-56129 Missing authorization in Generic IO & Memory Access driver
A local attacker can access physical memory via the Generic IO driver due to insufficient access control, leading to privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-56129?
CVE-2026-56129 is a medium-severity missing authorization vulnerability in Dynabook Inc. Generic IO & Memory Access driver, published on 25 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Generic IO & Memory Access driver for PCs provided by TOSHIBA CORPORATION and Dynabook Inc. exposes its IOCTL with insufficient access control. A logged-in user with no administrative privilege may access physical memory.
Weakness: CWE-782
Which versions are affected by CVE-2026-56129?
How do I fix CVE-2026-56129?
No fix has been published for CVE-2026-56129 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-56129 being exploited?
There is no known exploitation of CVE-2026-56129 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-62xh-mjg9-8qhv.