#VU93054 NULL pointer dereference in Linux kernel - CVE-2021-47407 

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Main Vulnerability Database Vulnerabilities #VU93054

#VU93054 NULL pointer dereference in Linux kernel - CVE-2021-47407

Published: June 21, 2024 / Updated: May 13, 2025


Vulnerability identifier: #VU93054
Vulnerability risk: Low
CVSSv4.0: 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-2021-47407
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
Linux kernel
Software vendor:
Linux Foundation

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_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.

External links