#VU116376 Input validation error in Linux kernel - CVE-2023-53473
Published: October 1, 2025 / Updated: October 27, 2025
Vulnerability identifier: #VU116376
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-2023-53473
CWE-ID: CWE-20
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 input validation within the dx_show_leaf(), dx_probe(), htree_dirblock_to_tree(), dx_make_map(), ext4_fname_setup_ci_filename() and make_indexed_dir() functions in fs/ext4/namei.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's repository.
External links
- https://git.kernel.org/stable/c/4b3cb1d108bfc2aebb0d7c8a52261a53cf7f5786
- https://git.kernel.org/stable/c/70d579aefa652a06af97e013e3fbbabbe5a43553
- https://git.kernel.org/stable/c/b2531936118deb3f479c4fa1bcd787b74b8faa6a
- https://git.kernel.org/stable/c/c1fae027da61fe8e7eb99f7244297e81bc0f1e43
- https://git.kernel.org/stable/c/f68876aeef96ef8b708ab10b9cb47ce0a5adb424
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.29