SB2025022798 - NULL pointer dereference in Linux kernel kvm mmu
Published: February 27, 2025 Updated: May 11, 2025
Security Bulletin ID
SB2025022798
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-2025-21740)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the mmu_destroy_caches(), set_nx_huge_pages(), set_nx_huge_pages_recovery_param() and kvm_mmu_start_lpage_recovery() functions in arch/x86/kvm/mmu/mmu.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.