NULL pointer dereference in Linux kernel - CVE-2026-89912
Published: September 17, 2026
Vulnerability identifier: #VU150369
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-89912
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a null pointer dereference in vgic_its_save_ite() in the KVM arm64 vgic-its component when saving ITS tables during virtual machine migration after processing MAPD, MAPTI, and MAPC with V=0 commands. A remote attacker can issue MAPD, MAPTI, and MAPC commands with V=0 in a guest to cause a denial of service.
The command sequence is architecturally unpredictable.
Affected software
Linux kernel
How to mitigate CVE-2026-89912
Install security update from vendor's repository.