SB2026072173 - Improper Validation of Specified Quantity in Input in Linux kernel iommu intel driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Validation of Specified Quantity in Input (CVE-ID: CVE-2026-53372)

CWE-ID: CWE-1284 - Improper Validation of Specified Quantity in Input

CVSSv4: 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

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/3ea9ce757bd3de955b56e7bc5672fc479e40b045
• https://git.kernel.org/stable/c/9009c1af5458322469fa9a4371081a4449c5947d
• https://git.kernel.org/stable/c/cc5bd898ff70710ffc41cd8e5c2741cb64750047