#VU89936 Memory leak in Linux kernel - CVE-2021-47442
Published: May 30, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU89936
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-2021-47442
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 digital_in_send_sdd_req() function in net/nfc/digital_technology.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/74569c78aa84f8c958f1334b465bc530906ec99a
- https://git.kernel.org/stable/c/88c890b0b9a1fb9fcd01c61ada515e8b636c34f9
- https://git.kernel.org/stable/c/fcce6e5255474ca33c27dda0cdf9bf5087278873
- https://git.kernel.org/stable/c/071bdef36391958c89af5fa2172f691b31baa212
- https://git.kernel.org/stable/c/2bde4aca56db9fe25405d39ddb062531493a65db
- https://git.kernel.org/stable/c/50cb95487c265187289810addec5093d4fed8329
- https://git.kernel.org/stable/c/6432d7f1d1c3aa74cfe8f5e3afdf81b786c32e86
- https://git.kernel.org/stable/c/291c932fc3692e4d211a445ba8aa35663831bac7
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.252
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.213
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.290
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.288
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.75
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.14
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.155