NULL pointer dereference in Linux kernel - CVE-2026-43346
Published: May 9, 2026
Vulnerability identifier: #VU130839
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43346
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 improper handling of a NULL pointer in ice_ptp_setup_pf when initializing PTP support in a VFIO passthrough setup where the passed-through PF does not own the source timer. A local user can configure or use such a passthrough environment to trigger a kernel warning and cause a denial of service.
Exploitation requires a VFIO passthrough configuration in which only a PF that does not own the source timer is passed through.
How to mitigate CVE-2026-43346
Install security update from vendor's repository.