Use-after-free in Linux kernel - CVE-2023-52973
Published: March 27, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU106173
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-52973
CWE-ID: CWE-416
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 escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the vcs_read() function in drivers/tty/vt/vc_screen.c. A local user can escalate privileges on the system.
How to mitigate CVE-2023-52973
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/226fae124b2dac217ea5436060d623ff3385bc34
- https://git.kernel.org/stable/c/55515d7d8743b71b80bfe68e89eb9d92630626ab
- https://git.kernel.org/stable/c/6332f52f44b9776568bf3c0b714ddfb0bb175e78
- https://git.kernel.org/stable/c/8506f16aae9daf354e3732bcfd447e2a97f023df
- https://git.kernel.org/stable/c/af79ea9a2443016f64d8fd8d72020cc874f0e066
- https://git.kernel.org/stable/c/d0332cbf53dad06a22189cc341391237f4ea6d9f
- https://git.kernel.org/stable/c/fc9e27f3ba083534b8bbf72ab0f5c810ffdc7d18
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.93