SB20251230220 - NULL pointer dereference in Linux kernel mips kvm
Published: December 30, 2025 Updated: December 30, 2025
Security Bulletin ID
SB20251230220
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-2023-54241)
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.
Remediation
Install update from vendor's website.
References
- 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