Memory leak in Linux kernel - CVE-2021-47553
Published: May 30, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU89932
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-2021-47553
CWE-ID: CWE-401
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 memory leak within the init_idle() and idle_task_exit() functions in kernel/sched/core.c, within the bringup_cpu() function in kernel/cpu.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/e6ee7abd6bfe559ad9989004b34c320fd638c526
- https://git.kernel.org/stable/c/229c555260cb9c1ccdab861e16f0410f1718f302
- https://git.kernel.org/stable/c/dce1ca0525bfdc8a69a9343bc714fbc19a2f04b3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.83
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.6
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16