Security restrictions bypass in Linux kernel - CVE-2022-23222
Published: January 20, 2022 / Updated: July 11, 2022
Vulnerability identifier: #VU59896
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2022-23222
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
Public exploit is 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 availability of pointer arithmetic via certain *_OR_NULL pointer types in kernel/bpf/verifier.c in the Linux kernel. A local user can run a specially crafted program to execute arbitrary code with root privileges.
How to mitigate CVE-2022-23222
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
As a temporary solution set kernel.unprivileged_bpf_disabled to 1.