CVE-2026-64214
kernel: powerpc/time: Remove redundant preempt_disable|enable() calls from arch_irq_work_raise()
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 24, 2026
Updated · October 21, 2026
Description
A flaw was found in the Linux kernel's PowerPC architecture implementation. This issue allows a local user to cause a Denial of Service (DoS) through an unexpected system crash. When the kernel processes machine check exceptions in real mode, it improperly attempts to access preemption tracking data that is inaccessible in that execution context. This improper access results in an invalid memory read, triggering a kernel panic.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-125 · Out-of-bounds Read