#VU93292 Resource management error in Linux kernel - CVE-2021-47433
Published: June 25, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU93292
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-2021-47433
CWE-ID: CWE-399
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 resource management error within the btrfs_replace_file_extents() function in fs/btrfs/file.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/0e32a2b85c7d92ece86c17dfef390c5ed79c6378
- https://git.kernel.org/stable/c/0e309e1152fc34ef75991d9d69b165dbf75bf26c
- https://git.kernel.org/stable/c/4afb912f439c4bc4e6a4f3e7547f2e69e354108f
- 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