Input validation error in Linux kernel - CVE-2021-47322
Published: July 2, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU93674
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-2021-47322
CWE-ID: CWE-20
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 improper input validation within the nfs_direct_write_completion() function in fs/nfs/direct.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2021-47322
Install update from vendor's website.
Linux kernel - addressed in versions 5.10.52, 5.12.19, 5.13.4, 5.14
External References
- https://git.kernel.org/stable/c/5c7ef8a3705542136a1e19b070e951f0730b2153
- https://git.kernel.org/stable/c/7c96a2ee45be41d5a167e6332d202086752c36bb
- https://git.kernel.org/stable/c/7aec9f862411906f8c27071ba65a1e110ad7d2fd
- https://git.kernel.org/stable/c/3731d44bba8e0116b052b1b374476c5f6dd9a456
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.52
- 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