SB20240621103 - NULL pointer dereference in Linux kernel include asm
Published: June 21, 2024 Updated: May 13, 2025
Security Bulletin ID
SB20240621103
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-2021-47407)
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_arch_free_vm() and kvm_arch_init_vm() functions in arch/x86/kvm/x86.c, within the kvm_page_track_cleanup() function in arch/x86/kvm/mmu/page_track.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/deb2949417677649e2413266d7ce8c2ff73952b4
- https://git.kernel.org/stable/c/4664318f73e496cd22c71b10888e75434a123e23
- https://git.kernel.org/stable/c/eb7511bf9182292ef1df1082d23039e856d1ddfb
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.71
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15