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CVE-2026-64214

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: powerpc/time: Remove redundant preempt_disable|enable() calls from arch_irq_work_raise() A kernel panic is observed when handli…

Published Jul 24, 2026CWE-476EPSS 0.12%

Overview

CVE-2026-64214 is a medium-severity vulnerability. It was published on July 24, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

powerpc/time: Remove redundant preempt_disable|enable() calls from arch_irq_work_raise()

A kernel panic is observed when handling machine check exceptions from

real mode.

BUG: Unable to handle kernel data access on read at 0xc00000006be21300

Oops: Kernel access of bad area, sig: 11 [#1]

MSR: 8000000000001003 <SF,ME,RI,LE> CR: 88222248 XER: 00000005

CFAR: c00000000003ffc4 DAR: c00000006be21300 DSISR: 40000000 IRQMASK: 0

NIP [c000000000029e40] arch_irq_work_raise+0x10/0x70

LR [c00000000003ffc8] machine_check_queue_event+0xa8/0x150

Call Trace:

[c0000000179d3c70] [c00000000003ff64] machine_check_queue_event+0x44/0x150

[c0000000179d3d30] [c0000000000084e0] machine_check_early_common+0x1f0/0x2c0

The crash occurs because arch_irq_work_raise() calls preempt_disable()

from machine check exception (MCE) handlers running in real mode. In

this context, accessing the preempt_count can fault, leading to the

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/31467b23823ffec1f6fff407f8e3ca9af8b7491aRefgit.kernel.org/stable/c/51860e423592893cd7bfa7287d99a3aff4dc3a9dRefgit.kernel.org/stable/c/6dcd072a5ae3aed336e4a67a7d4cc5205b240065Refgit.kernel.org/stable/c/72d8d1c36452a4d3ee134b1da48de7518c1329f9Refgit.kernel.org/stable/c/8079acc5ee5235a627e4586d4f42082a9000ea64Refgit.kernel.org/stable/c/a09d07ac45e283c9861a9ceea06f56d0ba851d22

How CyberStrike helps

Frequently asked questions

What is CVE-2026-64214?

CVE-2026-64214 is a medium-severity vulnerability. It was published on July 24, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-64214?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-64214?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-64214?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-64214 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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