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Review reviewHigh

CVE-2026-45862

Linux 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.

CVSS
7.8
EPSS
0.15%
4.62% percentile
CISA KEV
Not listed
Published
2026.05.27
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.15%
Technical severityCVSS 7.8

Vulnerability overview

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.

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
7e00b52c8cdd9d3a985d63d72ecae7bde6314883, 5c65f097124770c3e5b9b83ed1a8b68c119bc7b5, 2bed9455db7cc0ab7ece6b3d846472097b52855a, 194b3348bdbb7db65375c72f3f774aee4cc6614e, 1b48c70feefc499b62670521efa002ab01e05df5, bc348a6cc8f92e9979fbfbb3c6b48fd51b4b1dbf, 5.10.175, 5.15.103, 6.1.16, 5.4.237, 6.2.3, 6.3, >= 5.4.237 < 5.5, >= 5.10.175 < 5.10.252, >= 5.15.103 < 5.15.202, >= 6.1.16 < 6.1.165, >= 6.2.3 < 6.6.128, >= 6.7 < 6.12.75, >= 6.13 < 6.18.14, >= 6.19 < 6.19.4
Fixed versions
5.5, 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.14, 6.19.4

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE
Not available