Improper error handling in Linux kernel - CVE-2021-47143
Published: June 3, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90956
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-2021-47143
CWE-ID: CWE-388
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 error handling within the EXPORT_SYMBOL_GPL() and smcd_register_dev() functions in net/smc/smc_ism.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2021-47143
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/8b2cdc004d21a7255f219706dca64411108f7897
- https://git.kernel.org/stable/c/40588782f1016c655ae1d302892f61d35af96842
- https://git.kernel.org/stable/c/444d7be9532dcfda8e0385226c862fd7e986f607
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.42
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.9
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13