#VU93189 Resource management error in Linux kernel - CVE-2021-47387
Published: June 24, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU93189
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-2021-47387
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 sugov_tunables_free(), sugov_tunables_alloc(), sugov_init() and sugov_exit() functions in kernel/sched/cpufreq_schedutil.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/cb4a53ba37532c861a5f3f22803391018a41849a
- https://git.kernel.org/stable/c/463c46705f321201090b69c4ad5da0cd2ce614c9
- https://git.kernel.org/stable/c/30d57cf2c4116ca6d34ecd1cac94ad84f8bc446c
- https://git.kernel.org/stable/c/67c98e023135ff81b8d52998a6fdb8ca0c518d82
- https://git.kernel.org/stable/c/a7d4fc84404d45d72f4490417e8cc3efa4af93f1
- https://git.kernel.org/stable/c/8d62aec52a8c5b1d25a2364b243fcc5098a2ede9
- https://git.kernel.org/stable/c/e5c6b312ce3cc97e90ea159446e6bfa06645364d
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.249
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.209
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.285
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.71
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.151