#VU92357 Improper locking in Linux kernel - CVE-2021-47615
Published: June 20, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU92357
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-47615
CWE-ID: CWE-667
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 perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the mlx5_ib_dereg_mr(), mlx5_ib_alloc_pi_mr() and __mlx5_ib_alloc_mr() functions in drivers/infiniband/hw/mlx5/mr.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/e3bc4d4b50cae7db08e50dbe43f771c906e97701
- https://git.kernel.org/stable/c/c44979ace49b4aede3cc7cb5542316e53a4005c9
- https://git.kernel.org/stable/c/f0ae4afe3d35e67db042c58a52909e06262b740f
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.14
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16