NULL pointer dereference in Linux kernel - CVE-2021-47464
Published: June 3, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90837
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-2021-47464
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 audit_filter_rules() function in kernel/auditsc.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/d6f451f1f60c58d73038c7c3177066f8f084e2a2
- https://git.kernel.org/stable/c/16802fa4c33eb1a8efb23f1e93365190e4047d05
- https://git.kernel.org/stable/c/4e9e46a700201b4c85081fd478c99c692a9aaa0d
- https://git.kernel.org/stable/c/6e3ee990c90494561921c756481d0e2125d8b895
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.76
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.156