#VU59811 Use-after-free in Linux kernel - CVE-2021-0920

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Main Vulnerability Database Vulnerabilities #VU59811

#VU59811 Use-after-free in Linux kernel - CVE-2021-0920

Published: January 19, 2022 / Updated: May 23, 2022


Vulnerability identifier: #VU59811
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear
CVE-ID: CVE-2021-0920
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: The vulnerability is being exploited in the wild
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 unix_scm_to_skb() function of af_unix.c in Linux kernel. A local user can run a specially crafted program to trigger a race condition and execute arbitrary code with elevated privileges.



Remediation

Install updates from vendor's website.

External links