SB2025120886 - NULL pointer dereference in Linux kernel kvm vmx
Published: December 8, 2025 Updated: December 12, 2025
Security Bulletin ID
SB2025120886
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2023-53756)
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.
Remediation
Install update from vendor's website.
References
- 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