#VU93596 Resource management error in Linux kernel - CVE-2021-4440
Published: July 1, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU93596
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-2021-4440
CWE-ID: CWE-399
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 resource management error within the SYM_CODE_START() function in arch/x86/xen/xen-asm.S, within the native_patch() function in arch/x86/kernel/paravirt_patch.c, within the paravirt_patch_default() and native_steal_clock() functions in arch/x86/kernel/paravirt.c, within the main() function in arch/x86/kernel/asm-offsets_64.c, within the SYM_INNER_LABEL() and SYM_CODE_END() functions in arch/x86/entry/entry_64.S. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.