CVE-2026-98712
kernel: KVM: arm64: vgic: Take a refcount on IRQs referenced by last_lr_irq
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 18, 2026
Updated · October 23, 2026
Description
A flaw was found in the Linux kernel's KVM (Kernel-based Virtual Machine) subsystem for ARM64. The virtual interrupt controller fails to maintain an appropriate reference count on active interrupts, allowing them to be reclaimed and freed while still in use. A malicious guest user could exploit this issue during concurrent interrupt unmapping to trigger a use-after-free condition, resulting in a Denial of Service (DoS) by crashing the host system.
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 · 6.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
CWE-825 · Expired Pointer Dereference