NULL pointer dereference in Linux kernel - CVE-2021-47399
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90502
CSH Severity: 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-2021-47399
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 within the ixgbe_xdp_setup() function in drivers/net/ethernet/intel/ixgbe/ixgbe_main.c, within the ixgbe_max_channels() function in drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.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/20f6c4a31a525edd9ea6243712b868ba0e4e331e
- https://git.kernel.org/stable/c/2744341dd52e935344ca1b4bf189ba0d182a3e8e
- https://git.kernel.org/stable/c/513e605d7a9ce136886cb42ebb2c40e9a6eb6333
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.71
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15