What is CVE-2026-45862?

CVE-2026-45862 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 5.10.175 onward and patched in 5.10.252, 5.15.202, 6.1.165 and others. CVE-2026-45862 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-45862?

CVE-2026-45862 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.

Is there a patch available for CVE-2026-45862?

Yes, CVE-2026-45862 has been patched. Fixed versions include 5.10.252, 5.15.202, 6.1.165 and others. If you are running Linux kernel 5.10.175 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-45862 actively exploited?

CVE-2026-45862 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-45862

High

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.

Package Linux Kernel

Published 2026-05-27

Last modified 2026-05-30

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 5.10.175, 5.15.103, 6.1.16, 5.4.237, 6.2.3, 6.3 and later are affected. Fixed in 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.14, 6.19.4, 7.0 and their respective stable series.

Affected from

≥ 5.10.175 ≥ 5.15.103 ≥ 6.1.16 ≥ 5.4.237 ≥ 6.2.3 ≥ 6.3

Fixed in

✓ 5.10.252 5.10.x ✓ 5.15.202 5.15.x ✓ 6.1.165 6.1.x ✓ 6.6.128 6.6.x ✓ 6.12.75 6.12.x ✓ 6.18.14 6.18.x ✓ 6.19.4 6.19.x ✓ 7.0

References

The following references provide additional information about CVE-2026-45862 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/0616137b70e6d9a547d4b60df8e1b64e36d83661
Patch
Kernel patch commit
https://git.kernel.org/stable/c/22d169bdd2849fe6bd18c2643742e1c02be6451c
Patch
Kernel patch commit
https://git.kernel.org/stable/c/36244dfd3853f7bf89d03b8e90d56b23ce7fbc16
Patch

8 patch commits total View all on NVD

Details

CVE ID CVE-2026-45862

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-05-27

Modified 2026-05-30

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-45862?

CVE-2026-45862 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 5.10.175 onward and has been patched in 5.10.252, 5.15.202, 6.1.165 and others. CVE-2026-45862 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-45862?

CVE-2026-45862 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.
Is there a patch available for CVE-2026-45862?

Yes — CVE-2026-45862 has been patched. Fixed versions include 5.10.252, 5.15.202, 6.1.165 and others. If you are running Linux kernel 5.10.175 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-45862 actively exploited?

No — CVE-2026-45862 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.