NULL pointer dereference in Linux kernel - CVE-2021-47008
Published: June 1, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90647
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-2021-47008
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 svm_get_msr() function in arch/x86/kvm/svm/svm.c, within the sev_vcpu_deliver_sipi_vector() function in arch/x86/kvm/svm/sev.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/fb9e14f4f8217a0980f8da2c8ff70dee058cbe47
- https://git.kernel.org/stable/c/fd722a57fe0b80133dacae4e1c852ee4212f9b2e
- https://git.kernel.org/stable/c/a3ba26ecfb569f4aa3f867e80c02aa65f20aadad
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.22
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13