NULL pointer dereference in Linux kernel - CVE-2021-47186
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90581
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-2021-47186
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 tipc_aead_init() function in net/tipc/crypto.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/a7d91625863d4ffed63b993b5e6dc1298b6430c9
- https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10
- https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.82
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16