#VU59811 Use-after-free


Published: 2022-01-19 | Updated: 2022-05-23

Vulnerability identifier: #VU59811

Vulnerability risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-0920

CWE-ID: CWE-416

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

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.


Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions


CPE

External links
http://source.android.com/security/bulletin/2021-11-01
http://lists.debian.org/debian-lts-announce/2021/12/msg00012.html


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?


Latest bulletins with this vulnerability