CVE-2026-45862 Details
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.
A vulnerability exists in the Linux kernel's IOMMU (Input-Output Memory Management Unit) handling of Process Address Space ID (PASID) tables. When a new, zero-initialized PASID table is allocated, the address is written to the PASID directory entry before the CPU cache is flushed. This creates a risk that the PASID table could be used by non-coherent IOMMU hardware while it still contains random, uninitialized data. The issue has been addressed by ensuring that the cache is flushed after the PASID table is allocated but before it is used.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for downloading the patched version are available on the Linux kernel's official website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/0616137b70e6d9a547d4b60df8e1b64e36d83661 | kernel.org | Patch |
| https://git.kernel.org/stable/c/22d169bdd2849fe6bd18c2643742e1c02be6451c | kernel.org | Patch |
| https://git.kernel.org/stable/c/36244dfd3853f7bf89d03b8e90d56b23ce7fbc16 | kernel.org | Patch |
| https://git.kernel.org/stable/c/36990407cdd257473607e33802d00e978af2759e | kernel.org | Patch |
| https://git.kernel.org/stable/c/5962c30a6f05ea1ab73f039e235bb30716243517 | kernel.org | Patch |
| https://git.kernel.org/stable/c/c93f23375d8c410954b0df825e814b632fd62b9d | kernel.org | Patch |
| https://git.kernel.org/stable/c/cd75e77125c8a51754ca4cd60b4ca083ed735d1d | kernel.org | Patch |
| https://git.kernel.org/stable/c/d15cda135148ea7ba929cfdbcf208182bc29a7aa | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 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 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 25, 2026 | Initial Analysis | [email protected] |
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 30, 2026 | CVE Modified | kernel.org |
| May 27, 2026 | New CVE Received | kernel.org |