#VU90913 Reachable assertion in Linux kernel - CVE-2021-47091
Published: June 3, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90913
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-2021-47091
CWE-ID: CWE-617
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 reachable assertion within the ieee80211_start_ap() function in net/mac80211/cfg.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/ac61b9c6c0549aaeb98194cf429d93c41bfe5f79
- https://git.kernel.org/stable/c/c1d1ec4db5f7264cfc21993e59e8f2dcecf4b44f
- https://git.kernel.org/stable/c/87a270625a89fc841f1a7e21aae6176543d8385c
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.89
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.12
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16