PT-2026-43729 · Linux · Linux

Published 2026-05-27 · Updated 2026-05-27 · CVE-2026-45862

Mitre

CVSS v3.1

7.8

High

Base vector

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

In the Linux kernel, the following vulnerability has been resolved:

iommu/vt-d: Flush cache for PASID table before using it

When writing the address of a freshly allocated zero-initialized PASID table to a PASID directory entry, do that after the CPU cache flush for this PASID table, not before it, to avoid the time window when this PASID table may be already used by non-coherent IOMMU hardware while its contents in RAM is still some random old data, not zero-initialized.

Fix

Related Identifiers

CVE-2026-45862

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-45862 · Security Note
• https://git.kernel.org/stable/c/cd75e77125c8a51754ca4cd60b4ca083ed735d1d · Note
• https://git.kernel.org/stable/c/22d169bdd2849fe6bd18c2643742e1c02be6451c · Note
• https://git.kernel.org/stable/c/d15cda135148ea7ba929cfdbcf208182bc29a7aa · Note
• https://git.kernel.org/stable/c/c93f23375d8c410954b0df825e814b632fd62b9d · Note
• https://git.kernel.org/stable/c/0616137b70e6d9a547d4b60df8e1b64e36d83661 · Note
• https://git.kernel.org/stable/c/36990407cdd257473607e33802d00e978af2759e · Note
• https://git.kernel.org/stable/c/5962c30a6f05ea1ab73f039e235bb30716243517 · Note
• https://git.kernel.org/stable/c/36244dfd3853f7bf89d03b8e90d56b23ce7fbc16 · Note