#VU61246 Use-after-free in Linux kernel - CVE-2021-4083

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Main Vulnerability Database Vulnerabilities #VU61246

#VU61246 Use-after-free in Linux kernel - CVE-2021-4083

Published: March 10, 2022


Vulnerability identifier: #VU61246
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-4083
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
Linux kernel
Software vendor:
Linux Foundation

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the Linux kernel's garbage collection for Unix domain socket file handlers. A local user can call close() and fget() simultaneously and can potentially trigger a race condition, which in turn leads to a use-after-free error and allows privilege escalation.


Remediation

Install updates from vendor's website.

External links