What is CVE-2026-46317?

CVE-2026-46317 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10, affecting Linux kernel versions from 6.11 onward and patched in 6.18.35, 7.0.12 and 7.1. CVE-2026-46317 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-46317?

CVE-2026-46317 has a CVSS score of 8.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Is there a patch available for CVE-2026-46317?

Yes, CVE-2026-46317 has been patched. Fixed versions include 6.18.35, 7.0.12 and 7.1. If you are running Linux kernel 6.11 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-46317 actively exploited?

CVE-2026-46317 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-46317

High

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Reassign nested_mmus array behind mmu_lock kvm->arch.nested_mmus[] is walked under kvm->mmu_lock, including from the MMU notifier path (kvm_unmap_gfn_range() -> kvm_nested_s2_unmap()), which can run at any time. kvm_vcpu_init_nested() reallocates the array and frees the old buffer while holding only kvm->arch.config_lock, so such a walker can reference the freed array. Allocate the new array outside of mmu_lock, as the allocation can sleep. Under the lock, copy the existing entries, fix up the back pointers and reassign the array. Free the old buffer after dropping the lock, as kvfree() can sleep as well.

Package Linux Kernel

Published 2026-06-09

Last modified 2026-07-23

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

8.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 6.11 and later are affected. Fixed in 6.18.35, 7.0.12, 7.1 and their respective stable series.

Affected from

≥ 6.11

Fixed in

✓ 6.18.35 6.18.x ✓ 7.0.12 7.0.x ✓ 7.1

References

3 total

Kernel Git
https://git.kernel.org/stable/c/4424dbcb06d68e34e51c019a5781a7dc00731971

Patch
Kernel Git
https://git.kernel.org/stable/c/70543358fa08e0f7cebc3447c3b70fe97ad7aaa8

Patch
Kernel Git
https://git.kernel.org/stable/c/918450ad6010df6ecd2efde12a1409e011da22d6

Patch

Details

CVE ID CVE-2026-46317

Severity High

CVSS score 8.8 / 10

CVSS version 3.1

Published 2026-06-09

Modified 2026-07-23

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-46317?

CVE-2026-46317 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10 . It affects Linux kernel versions from 6.11 onward and has been patched in 6.18.35, 7.0.12 and 7.1. CVE-2026-46317 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-46317?

CVE-2026-46317 has a CVSS score of 8.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
Is there a patch available for CVE-2026-46317?

Yes. CVE-2026-46317 has been patched. Fixed versions include 6.18.35, 7.0.12 and 7.1. If you are running Linux kernel 6.11 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-46317 actively exploited?

No. CVE-2026-46317 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.