Use-after-free in Linux kernel - CVE-2022-49892
Published: May 2, 2025 / Updated: May 10, 2025
Vulnerability identifier: #VU108227
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-2022-49892
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 ftrace_shutdown() function in kernel/trace/ftrace.c. A local user can escalate privileges on the system.
How to mitigate CVE-2022-49892
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/0e792b89e6800cd9cb4757a76a96f7ef3e8b6294
- https://git.kernel.org/stable/c/88561a66777e7a2fe06638c6dcb22a9fae0b6733
- https://git.kernel.org/stable/c/cc1b9961a0ceb70f6ca4e2f4b8bb71c87c7a495c
- https://git.kernel.org/stable/c/ea5f2fd4640ecbb9df969bf8bb27733ae2183169
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.154