Improper Validation of Specified Quantity in Input in Linux kernel - CVE-2026-53372
Published: July 21, 2026
Vulnerability identifier: #VU138897
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-53372
CWE-ID: CWE-1284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a loss of dirty page tracking integrity.
The vulnerability exists due to improper state validation in PASID attachment handling for nested IOMMU domains when attaching a PASID to a nested domain with dirty tracking configured on the parent domain. A local user can attach a PASID to such a nested domain to cause a loss of dirty page tracking integrity.
The issue occurs because the kernel lacks dirty tracking support for nested domains in this configuration.
How to mitigate CVE-2026-53372
Install security update from vendor's repository.