#VU90253 Use-after-free in Linux kernel - CVE-2021-47012
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90253
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-2021-47012
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 siw_mr_add_mem() function in drivers/infiniband/sw/siw/siw_mem.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/30b9e92d0b5e5d5dc1101ab856c17009537cbca4
- https://git.kernel.org/stable/c/608a4b90ece039940e9425ee2b39c8beff27e00c
- https://git.kernel.org/stable/c/3e22b88e02c194f6c80867abfef5cc09383461f4
- https://git.kernel.org/stable/c/ad9ce7188432650469a6c7625bf479f5ed0b6155
- https://git.kernel.org/stable/c/3093ee182f01689b89e9f8797b321603e5de4f63
- 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
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.119