Improper locking in Linux kernel - CVE-2021-47622
Published: July 17, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU94457
CSH Severity: Low
CVSS v4.0: 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-2021-47622
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the EXPORT_SYMBOL_GPL(), ufshcd_hba_capabilities(), ufshcd_wait_for_dev_cmd(), ufshcd_exec_dev_cmd(), ufshcd_issue_devman_upiu_cmd() and ufshcd_init() functions in drivers/scsi/ufs/ufshcd.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2021-47622
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/493c9e850677df8b4eda150c2364b1c1a72ed724
- https://git.kernel.org/stable/c/d69d98d8edf90e25e4e09930dd36dd6d09dd6768
- https://git.kernel.org/stable/c/945c3cca05d78351bba29fa65d93834cb7934c7b
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.25
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.11
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17