CVE-2026-53326
kernel: debugobjects: Don't call fill_pool() in early boot hardirq context
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 1, 2026
Updated · July 24, 2026
Description
A flaw was found in the Linux kernel's debugobjects subsystem. During early boot on a debug PREEMPT_RT kernel on an ARM64 system, interrupts can occur before the scheduler is fully enabled. In this specific window, the hard interrupt context handler may attempt to fill a pool, which can lead to a deadlock. This issue can cause the system to become unresponsive.
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-833 · Deadlock