NULL pointer dereference in Linux kernel - CVE-2022-50877
Published: December 30, 2025 / Updated: December 30, 2025
Vulnerability identifier: #VU120793
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2022-50877
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the bcm4908_enet_start_xmit() and bcm4908_enet_poll_tx() functions in drivers/net/ethernet/broadcom/bcm4908_enet.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2022-50877
Install update from vendor's repository.
Linux kernel - addressed in versions 5.15.77, 6.0.7, 6.1
External References
- https://git.kernel.org/stable/c/2adedc80faec243ede55355e57142110d6f46e08
- https://git.kernel.org/stable/c/c9589e18a60c55c76772a38117ef9a16b942e56b
- https://git.kernel.org/stable/c/ef3556ee16c68735ec69bd08df41d1cd83b14ad3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.77
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.7
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1