What is CVE-2026-64285?

CVE-2026-64285 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 7.0 onward and patched in 7.1.4 and 7.2. CVE-2026-64285 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64285?

CVE-2026-64285 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-64285?

Yes, CVE-2026-64285 has been patched. Fixed versions include 7.1.4 and 7.2. If you are running Linux kernel 7.0 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64285 actively exploited?

CVE-2026-64285 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-64285

Medium

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Pin source page for write when adding CPUID data for SNP guest When populating a guest_memfd instance with the initial CPUID data for an SNP guest, acquire a writable pin on the source page as KVM will write back the "correct" CPUID information if the userspace provided data is rejected by trusted firmware. Because KVM writes to the source page using a kernel mapping, pinning for read could result in KVM clobbering read-only memory. Note, well-behaved VMMs are unlikely to be affected, as CPUID information is almost always dynamically generated by userspace, i.e. it's unlikely for the CPUID information to be backed by a read-only mapping. [sean: rewrite shortlog and changelog, tag for stable@]

Package Linux Kernel

Published 2026-07-25

Last modified 2026-08-17

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Affected versions

Linux kernel versions 7.0 and later are affected. Fixed in 7.1.4, 7.2 and their respective stable series.

Affected from

≥ 7.0

Fixed in

✓ 7.1.4 7.1.x ✓ 7.2

References

2 total

Kernel Git
https://git.kernel.org/stable/c/dcdb476f5fc5701ec06c23efe3e3529f07ca391e

Patch
Kernel Git
https://git.kernel.org/stable/c/f13e900599089b10113ceb36013423f0837c6792

Patch

Details

CVE ID CVE-2026-64285

Severity Medium

CVSS score 5.5 / 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-2026-64285?

CVE-2026-64285 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 7.0 onward and has been patched in 7.1.4 and 7.2. CVE-2026-64285 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-64285?

CVE-2026-64285 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-64285?

Yes. CVE-2026-64285 has been patched. Fixed versions include 7.1.4 and 7.2. If you are running Linux kernel 7.0 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-64285 actively exploited?

No. CVE-2026-64285 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.