NULL pointer dereference in Linux kernel - CVE-2023-53756
Published: December 8, 2025 / Updated: December 12, 2025
Vulnerability identifier: #VU119328
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-2023-53756
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 perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the vmx_msr_bitmap_l01_changed() function in arch/x86/kvm/vmx/vmx.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2023-53756
Install update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/3ba95cc671c025d0d2a1c7d5e2930f0ff0980cf4
- https://git.kernel.org/stable/c/6baebcecf09acd19e2bab1c2911dcdba5d48a1dc
- https://git.kernel.org/stable/c/6e7bc50f97c9855da83f1478f722590defd45ff2
- https://git.kernel.org/stable/c/93827a0a36396f2fd6368a54a020f420c8916e9b
- https://git.kernel.org/stable/c/b2de2b4d4e007f9add46ea8dc06f781835e3ea9f
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.16