What is CVE-2026-64286?

CVE-2026-64286 is a High severity Linux kernel vulnerability with a CVSS score of 8.2 out of 10, affecting Linux kernel versions from 6.2 onward and patched in 6.6.145, 6.12.97, 6.18.39 and others. CVE-2026-64286 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64286?

CVE-2026-64286 has a CVSS score of 8.2 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

Is there a patch available for CVE-2026-64286?

Yes, CVE-2026-64286 has been patched. Fixed versions include 6.6.145, 6.12.97, 6.18.39 and others. If you are running Linux kernel 6.2 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64286 actively exploited?

CVE-2026-64286 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-64286

High

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Clear __hyp_running_vcpu when flushing the pKVM hyp vCPU flush_hyp_vcpu() copies the host vCPU context into the hyp's private vCPU on every run. ctxt_to_vcpu() expects a guest context to have a NULL __hyp_running_vcpu, which is only ever set on the host context, so that it resolves the vCPU via container_of(). While this is generally the case, flush_hyp_vcpu() copies the context verbatim and does not enforce this, so a value provided by the host is dereferenced at EL2 (host -> EL2). Fix by clearing __hyp_running_vcpu after the copy.

Package Linux Kernel

Published 2026-07-25

Last modified 2026-08-17

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

8.2

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 6.2 and later are affected. Fixed in 6.6.145, 6.12.97, 6.18.39, 7.1.4, 7.2 and their respective stable series.

Affected from

≥ 6.2

Fixed in

✓ 6.6.145 6.6.x ✓ 6.12.97 6.12.x ✓ 6.18.39 6.18.x ✓ 7.1.4 7.1.x ✓ 7.2

References

5 total

Kernel Git
https://git.kernel.org/stable/c/477145860dba4c30f0b4e36f02f4c5291c1c888b

Patch
Kernel Git
https://git.kernel.org/stable/c/6bea2f8becdb20d34378493c3b77a9b9cf8c6cfa

Patch
Kernel Git
https://git.kernel.org/stable/c/d4f4d61715d1061ba83b88196a3605662be30750

Patch
Kernel Git
https://git.kernel.org/stable/c/dfaef40d8a1533940fc1af788d70fce07362b4ce

Patch
Kernel Git
https://git.kernel.org/stable/c/e8042f6e1d7befb2fb6b10a75918642bcd0acf9a

Patch

Details

CVE ID CVE-2026-64286

Severity High

CVSS score 8.2 / 10

CVSS version 3.1

Published 2026-07-25

Modified 2026-08-17

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-64286?

CVE-2026-64286 is a High severity Linux kernel vulnerability with a CVSS score of 8.2 out of 10 . It affects Linux kernel versions from 6.2 onward and has been patched in 6.6.145, 6.12.97, 6.18.39 and others. CVE-2026-64286 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-64286?

CVE-2026-64286 has a CVSS score of 8.2 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
Is there a patch available for CVE-2026-64286?

Yes. CVE-2026-64286 has been patched. Fixed versions include 6.6.145, 6.12.97, 6.18.39 and others. If you are running Linux kernel 6.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-64286 actively exploited?

No. CVE-2026-64286 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.