NULL pointer dereference in Linux kernel - CVE-2021-47077
Published: June 1, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90638
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-2021-47077
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 qedf_update_link_speed() function in drivers/scsi/qedf/qedf_main.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/a6362a737572f66051deb7637f3f77ddf7a4402f
- https://git.kernel.org/stable/c/11014efcec378bb0050a6cf08eaf375e3693400a
- https://git.kernel.org/stable/c/73578af92a0fae6609b955fcc9113e50e413c80f
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.40
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.7
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13