SB2026050947 - NULL pointer dereference in Linux kernel intel ice driver

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-43346)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 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

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/bb3f21edc7056cdf44a7f7bd7ba65af40741838c
• https://git.kernel.org/stable/c/c73f365707d3b1b78b7d16e1f029020d1ae50d0f
• https://git.kernel.org/stable/c/e19675b384e9dcaca1bd5e4a67b8ad136eccfbe8