#VU90244 Use-after-free in Linux kernel - CVE-2021-47061
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90244
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:U/U:Clear
CVE-ID: CVE-2021-47061
CWE-ID: CWE-416
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 escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the kvm_io_bus_unregister_dev() function in virt/kvm/kvm_main.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/03c6cccedd3913006744faa252a4da5145299343
- https://git.kernel.org/stable/c/4e899ca848636b37e9ac124bc1723862a7d7d927
- https://git.kernel.org/stable/c/30f46c6993731efb2a690c9197c0fd9ed425da2d
- https://git.kernel.org/stable/c/2ee3757424be7c1cd1d0bbfa6db29a7edd82a250
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.37
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.21
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13