NULL pointer dereference in Linux kernel - CVE-2021-47572
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90402
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-2021-47572
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 nh_create_ipv6() function in net/ipv4/nexthop.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/7b6f44856da5ba0b1aa61403eb9fddd272156503
- https://git.kernel.org/stable/c/b70ff391deeec35cdd8a05f5f63f5fe28bc4f225
- https://git.kernel.org/stable/c/39509d76a9a3d02f379d52cb4b1449469c56c0e0
- https://git.kernel.org/stable/c/1c743127cc54b112b155f434756bd4b5fa565a99
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.83
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.6
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.163