#VU92356 Improper locking in Linux kernel - CVE-2021-47606
Published: June 20, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU92356
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-2021-47606
CWE-ID: CWE-667
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 improper locking within the netlink_sendmsg() function in net/netlink/af_netlink.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/c54a60c8fbaa774f828e26df79f66229a8a0e010
- https://git.kernel.org/stable/c/40cf2e058832d9cfaae98dfd77334926275598b6
- https://git.kernel.org/stable/c/54e785f7d5c197bc06dbb8053700df7e2a093ced
- https://git.kernel.org/stable/c/ff3f517bf7138e01a17369042908a3f345c0ee41
- https://git.kernel.org/stable/c/c0315e93552e0d840e9edc6abd71c7db82ec8f51
- https://git.kernel.org/stable/c/dadce61247c6230489527cc5e343b6002d1114c5
- https://git.kernel.org/stable/c/4c986072a8c9249b9398c7a18f216dc26a9f0e35
- https://git.kernel.org/stable/c/f123cffdd8fe8ea6c7fded4b88516a42798797d0
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.259
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.222
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.296
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.294
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.87
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.167