#VU92395 Null pointer dereference in Linux kernel - CVE-2021-46948
Published: June 20, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU92395
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-2021-46948
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 error within the efx_farch_handle_tx_event() function in drivers/net/ethernet/sfc/farch.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's repository.
External links
- https://git.kernel.org/stable/c/bf2b941d0a6f2d3b9f5fa3c4c21bdd54f71ce253
- https://git.kernel.org/stable/c/35c7a83ad1bb1d48ae249346e61b1132bcbf9052
- https://git.kernel.org/stable/c/e531db1ea6f98c9612cb2de093a107c7eadfb96c
- https://git.kernel.org/stable/c/83b09a1807415608b387c7bc748d329fefc5617e
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.36
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.20
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13