NULL pointer dereference in Linux kernel - CVE-2021-47005
Published: June 1, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90646
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-2021-47005
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 pci_epf_test_bind() function in drivers/pci/endpoint/functions/pci-epf-test.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
EMC Cloud Tiering Appliance
EMC Cloud Tiering Appliance
How to mitigate CVE-2021-47005
Install update from vendor's website.
Linux kernel - addressed in versions 5.10.38, 5.11.22, 5.12.5, 5.13
EMC Cloud Tiering Appliance - update to 13.2.0.2.29
EMC Cloud Tiering Appliance - update to 13.2.0.2.29
External References
- https://git.kernel.org/stable/c/bbed83d7060e07a5d309104d25a00f0a24441428
- https://git.kernel.org/stable/c/679ebad058b8168f10e63876d63b0877fd2fe784
- https://git.kernel.org/stable/c/0169d4f0bee44fdfef908c13ed21fcb326c38695
- https://git.kernel.org/stable/c/6613bc2301ba291a1c5a90e1dc24cf3edf223c03
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.38
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.22
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13