#VU92393 Null pointer dereference in Linux kernel - CVE-2021-47164
Published: June 20, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU92393
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-2021-47164
CWE-ID: CWE-476
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 null pointer dereference error within the mlx5e_rep_changelowerstate_event() function in drivers/net/ethernet/mellanox/mlx5/core/en/rep/bond.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's repository.
External links
- https://git.kernel.org/stable/c/2e4b0b95a489259f9d35a3db17023061f8f3d587
- https://git.kernel.org/stable/c/bdfd3593a8248eea6ecfcbf7b47b56b86515672d
- https://git.kernel.org/stable/c/83026d83186bc48bb41ee4872f339b83f31dfc55
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.42
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.9
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13