Out-of-bounds read in Linux kernel - CVE-2021-47044
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90353
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-2021-47044
CWE-ID: CWE-125
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 an out-of-bounds read error within the detach_tasks() function in kernel/sched/fair.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/80862cbf76c2646f709a57c4517aefe0b094c774
- https://git.kernel.org/stable/c/2f3eab368e313dba35fc2f51ede778bf7b030b54
- https://git.kernel.org/stable/c/805cea93e66ca7deaaf6ad3b67224ce47c104c2f
- https://git.kernel.org/stable/c/39a2a6eb5c9b66ea7c8055026303b3aa681b49a5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.37
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.21
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13