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Vulnerability record · CVE-2026-45862 · published 27 May 2026

CVE-2026-45862: Linux kernel vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.16% · top 96.0%
7.8CVSS 3.1 base score
0.16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
25 Jun 2026Last modified by NVD

Description

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/0616137b70e6d9a547d4b60df8e1b64e36d83661 Patch
https://git.kernel.org/stable/c/22d169bdd2849fe6bd18c2643742e1c02be6451c Patch
https://git.kernel.org/stable/c/36244dfd3853f7bf89d03b8e90d56b23ce7fbc16 Patch
https://git.kernel.org/stable/c/36990407cdd257473607e33802d00e978af2759e Patch
https://git.kernel.org/stable/c/5962c30a6f05ea1ab73f039e235bb30716243517 Patch
https://git.kernel.org/stable/c/c93f23375d8c410954b0df825e814b632fd62b9d Patch
https://git.kernel.org/stable/c/cd75e77125c8a51754ca4cd60b4ca083ed735d1d Patch
https://git.kernel.org/stable/c/d15cda135148ea7ba929cfdbcf208182bc29a7aa Patch

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Source: NIST National Vulnerability Database (record CVE-2026-45862), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.