What is CVE-2026-53277?

CVE-2026-53277 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10, affecting Linux kernel versions from 6.12 onward and patched in 6.18.36, 7.0.13 and 7.1. CVE-2026-53277 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-53277?

CVE-2026-53277 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-2026-53277?

Yes, CVE-2026-53277 has been patched. Fixed versions include 6.18.36, 7.0.13 and 7.1. If you are running Linux kernel 6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-53277 actively exploited?

CVE-2026-53277 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-53277

High

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation walk_s1() and kvm_walk_nested_s2() expect to be called while holding kvm->srcu to guard against memslot changes. While this is generally the case, __kvm_at_s12() and __kvm_find_s1_desc_level() call into the respective walkers without taking kvm->srcu. Fix by acquiring kvm->srcu prior to the table walk in both instances.

Package Linux Kernel

Published 2026-06-25

Last modified 2026-07-15

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

Weakness type

CWE-662

CVE-2026-53277 is classified as CWE-662

See CWE-662 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 6.12 and later are affected. Fixed in 6.18.36, 7.0.13, 7.1 and their respective stable series.

Affected from

≥ 6.12

Fixed in

✓ 6.18.36 6.18.x ✓ 7.0.13 7.0.x ✓ 7.1

References

6 total

Kernel Git
https://git.kernel.org/stable/c/97706097f9b851cfe55c3b00b083dfc2bcf542bc

Patch
Kernel Git
https://git.kernel.org/stable/c/ec42b4ed1b072ea2d03f086061aa67bad6d8de39

Patch
Kernel Git
https://git.kernel.org/stable/c/f2ca45b50d4216c9cc7ffabf50d9ad1932209251

Patch
Red Hat
https://access.redhat.com/security/cve/CVE-2026-53277

Third Party Advisory
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=2492725

Issue Tracking Third Party Advisory

Showing 5 of 6 references View all on NVD

Details

CVE ID CVE-2026-53277

Severity High

CVSS score 8.8 / 10

CVSS version 3.1

Published 2026-06-25

Modified 2026-07-15

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-53277?

CVE-2026-53277 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10 . It affects Linux kernel versions from 6.12 onward and has been patched in 6.18.36, 7.0.13 and 7.1. CVE-2026-53277 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-53277?

CVE-2026-53277 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-2026-53277?

Yes. CVE-2026-53277 has been patched. Fixed versions include 6.18.36, 7.0.13 and 7.1. If you are running Linux kernel 6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-53277 actively exploited?

No. CVE-2026-53277 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.