CVE-2026-23198
kernel: KVM: Kernel crash due to improper IRQ routing during irqfd deassignment
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · February 14, 2026
Updated · August 21, 2026
Description
A flaw was found in the Kernel-based Virtual Machine (KVM) component of the Linux kernel. During the deassignment of an interrupt file descriptor (irqfd), the system mishandles interrupt routing information. This improper handling can lead to a kernel crash, resulting in a Denial of Service (DoS) for the affected system. In some scenarios, it could also cause data corruption.
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-476 · NULL Pointer Dereference