NULL pointer dereference in Linux kernel - CVE-2026-46034
Published: May 28, 2026
Vulnerability identifier: #VU132457
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-46034
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in vfio_cdx_set_msi_trigger() when handling VFIO_DEVICE_SET_IRQS requests with VFIO_IRQ_SET_DATA_BOOL or VFIO_IRQ_SET_DATA_NONE before interrupts are configured through the EVENTFD path. A local user can call VFIO_DEVICE_SET_IRQS with those flags before setting up interrupts to cause a denial of service.
How to mitigate CVE-2026-46034
Install security update from vendor's repository.