#VU60167 Use-after-free in Linux kernel - CVE-2022-24122
Published: January 31, 2022 / Updated: March 15, 2022
Vulnerability identifier: #VU60167
Vulnerability risk: Low
CVSSv4.0: 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:P/U:Clear
CVE-ID: CVE-2022-24122
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
Public exploit is available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error with in the kernel/ucount.c in Linux kernel, when unprivileged user namespaces are enabled. A local user can trigger a use-after-free error, because a ucounts object can outlive its namespace, and execute arbitrary ode with elevated privileges.
Remediation
Install updates from vendor's website.