CVE-2026-89769
kernel: clocksource/drivers/nxp-pit: Fix IRQ leak on cpuhp_setup_state error path
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 11, 2026
Updated · October 16, 2026
Description
A flaw was found in the Linux kernel's NXP PIT (Programmable Interrupt Timer) clocksource driver. When the CPU hotplug setup fails after an interrupt request (IRQ) has been successfully registered, the error handling does not properly free the IRQ. This oversight results in a leaked IRQ line and a dangling pointer, which could lead to a use-after-free vulnerability if the IRQ is subsequently triggered. A local attacker could potentially exploit this to cause system instability or execute arbitrary code.
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 · 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE-825 · Expired Pointer Dereference