Memory leak in Linux kernel - CVE-2021-47313
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90442
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2021-47313
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the cppc_verify_policy(), cppc_cpufreq_stop_cpu() and cppc_cpufreq_cpu_init() functions in drivers/cpufreq/cppc_cpufreq.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2021-47313
Install update from vendor's website.
Linux kernel - addressed in versions 5.12.19, 5.13.4, 5.14
External References
- https://git.kernel.org/stable/c/b775383355755885b19d2acef977f1ca132e80a3
- https://git.kernel.org/stable/c/e1b2b2b61d30d7ce057ec17237c217d152ed97f2
- https://git.kernel.org/stable/c/fe2535a44904a77615a3af8e8fd7dafb98fb0e1b
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.19
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14