Improper locking in Linux kernel - CVE-2020-36775
Published: June 3, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90808
CSH Severity: 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-2020-36775
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 f2fs_write_node_pages() function in fs/f2fs/node.c, within the __f2fs_write_data_pages() function in fs/f2fs/data.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/0478ccdc8ea016de1ebaf6fe6da0275c2b258c5b
- https://git.kernel.org/stable/c/8e8542437bb4070423c9754d5ba270ffdbae8c8d
- https://git.kernel.org/stable/c/df77fbd8c5b222c680444801ffd20e8bbc90a56e
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.189
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.7
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7