CVE-2026-56129

Insufficient IOCTL Access Control Exposes Physical Memory to Non-Admin Users

Published Jun 25, 2026 CVSS 4.0 · 6.8 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Dynabook
Dynabook generic Io & Memory Access Driver
Toshiba Corporation
Toshiba Corporation generic Io & Memory Access Driver
Vendors & Products Dynabook
Dynabook generic Io & Memory Access Driver
Toshiba Corporation
Toshiba Corporation generic Io & Memory Access Driver
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Insufficient IOCTL Access Control Exposes Physical Memory to Non-Admin Users
Type Values Removed Values Added
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.
Weaknesses CWE-782
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 6.8, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
jpcert
Published
Updated
Jun 25, 2026, 12:32 PM
Reserved
Jun 19, 2026, 2:06 AM
Status
Deferred
Published
Jun 25, 2026, 8:16 AM
Modified
Jun 25, 2026, 1:28 PM