NULL pointer dereference in Linux kernel - CVE-2021-47230
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90466
CSH Severity: 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-2021-47230
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
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 emulator_get_hflags() function in arch/x86/kvm/x86.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/cbb425f62df9df7abee4b3f068f7ed6ffc3561e2
- https://git.kernel.org/stable/c/669a8866e468fd020d34eb00e08cb41d3774b71b
- https://git.kernel.org/stable/c/df9a40cfb3be2cbeb1c17bb67c59251ba16630f3
- https://git.kernel.org/stable/c/78fcb2c91adfec8ce3a2ba6b4d0dda89f2f4a7c6
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.46
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.128