Improper locking in Linux kernel - CVE-2023-53623
Published: October 8, 2025 / Updated: October 26, 2025
Vulnerability identifier: #VU116801
CSH Severity: Low
CVSS v4.0: 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-2023-53623
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the __del_from_avail_list() and SYSCALL_DEFINE1() functions in mm/swapfile.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2023-53623
Install update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/111a79d9b92f0a679fe300ccd3119ae9741f3d54
- https://git.kernel.org/stable/c/4bdf1514b4268d29360ba9e43becdd49955bc7ae
- https://git.kernel.org/stable/c/6fe7d6b992113719e96744d974212df3fcddc76c
- https://git.kernel.org/stable/c/85cc118ce6f1a627901b6db50c9d01f2ad78cdbf
- https://git.kernel.org/stable/c/a55f268abdb74ac5633b75a09fefb58458e9d2a2
- https://git.kernel.org/stable/c/b9927d3a60ca9ed35625470888629c074e687ba0
- https://git.kernel.org/stable/c/e7bba7ddb4318d5ea939c8db747c2c2780ab66f4
- https://git.kernel.org/stable/c/ea8c42b3b6d95ced3a4f555f04686d00ef0bb206
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.178