Memory leak in Linux kernel - CVE-2021-47057
Published: May 30, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90030
CSH Severity: Low
CVSS v4.0: 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-2021-47057
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the sun8i_ss_prng_generate() and memcpy() functions in drivers/crypto/allwinner/sun8i-ss/sun8i-ss-prng.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2021-47057
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/617ec35ed51f731a593ae7274228ef2cfc9cb781
- https://git.kernel.org/stable/c/e1f2d739849c3239df1ea3f97d40bade4b808410
- https://git.kernel.org/stable/c/6516cb852d704ff8d615de1f93cd443a99736c3d
- https://git.kernel.org/stable/c/98b5ef3e97b16eaeeedb936f8bda3594ff84a70e
- 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