Incorrect calculation in Linux kernel - CVE-2021-47450
Published: July 4, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU93753
CSH Severity: Low
CVSS v4.0: 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-2021-47450
CWE-ID: CWE-682
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to incorrect calculation within the hyp_get_page() function in arch/arm64/kvm/hyp/nvhe/page_alloc.c, within the host_s2_zalloc_pages_exact() function in arch/arm64/kvm/hyp/nvhe/mem_protect.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2021-47450
Install update from vendor's website.