NULL pointer dereference in Linux kernel - CVE-2023-54241
Published: December 30, 2025 / Updated: December 30, 2025
Vulnerability identifier: #VU120775
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-2023-54241
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 _kvm_vz_restore_htimer(), _kvm_vz_save_htimer(), mips_process_maar(), kvm_vz_gpsi_cop0(), kvm_vz_get_one_reg(), kvm_vz_set_one_reg(), kvm_vz_vcpu_load_tlb(), kvm_vz_vcpu_load() and kvm_vz_vcpu_uninit() functions in arch/mips/kvm/vz.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2023-54241
Install update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/6b9fb255d53759e3ea9b30067cb55091df1caf06
- https://git.kernel.org/stable/c/bd9cf2a5f9e1b2229ad22f21de6f6ad1a9c8858e
- https://git.kernel.org/stable/c/cd517f9a9d07d41f4f3593b1da3982261e09d162
- https://git.kernel.org/stable/c/e4de2057698636c0ee709e545d19b169d2069fa3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.121
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.40
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5