#VU104713 Improper locking in Linux kernel - CVE-2021-47637
Published: February 26, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU104713
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-2021-47637
CWE-ID: CWE-667
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 improper locking within the do_rename() function in fs/ubifs/dir.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/37bdf1ad592555ecda1d55b89f6e393e4c0589d1
- https://git.kernel.org/stable/c/70e9090acc32348cedc5def0cd6d5c126efc97b9
- https://git.kernel.org/stable/c/83e42a78428fc354f5e2049935b84c8d8d29b787
- https://git.kernel.org/stable/c/8b278c8dcfb565cb65eceb62a38cbf7a7c326db5
- https://git.kernel.org/stable/c/9dddc8211430fb851ddf0b168e3a00c6f66cc185
- https://git.kernel.org/stable/c/afd427048047e8efdedab30e8888044e2be5aa9c
- https://git.kernel.org/stable/c/c58af8564a7b08757173009030b74baf4b2b762b
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.33