CVE-2026-64151 | In the Linux kernel, the following vulnerability has been re… | CVSS 8.4 HIGH

Description

In the Linux kernel, the following vulnerability has been resolved: iommupt: Check for missing PAGE_SIZE in the pgsize_bitmap Sashiko pointed out that the driver could drop PAGE_SIZE from the pgsize_bitmap. That is technically allowed but nothing does it, and such an iommu_domain would not be used with the DMA API today. Still, it is against the design and it is trivial to fix up. Lift the PT_WARN_ON to the if branch and just skip the fast path.

Metadata

CVE ID: CVE-2026-64151
State: PUBLISHED
Assigner: Linux
Reserved: 2026-07-19 07:54 UTC
Published: 2026-07-19 15:40 UTC
Last updated: 2026-07-20 13:43 UTC
Vendor / Product: Linux / Linux
Sources: cve.org · NVD

Severity & Metrics

8.4 HIGH CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Affected products (2)

Vendor	Product	Platform	Versions
Linux	Linux	—	dcd6a011a8d523a114af2360a8753de5bd60c139 < 00850f41da24423587abd6124a790dd4f12bcef3, dcd6a011a8d523a114af2360a8753de5bd60c139 < 8ef3f77c440005c7f04229a75976bfc078364247
Linux	Linux	—	6.19, 0 < 6.19, 7.0.11 ≤ 7.0., 7.1 ≤

CVSS scores (1)

Score	Severity	Version	Source	Vector
8.4	HIGH	3.1	cna	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

References (2)