#VU51547 Use-after-free in Linux kernel - CVE-2020-25656

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Main Vulnerability Database Vulnerabilities #VU51547

#VU51547 Use-after-free in Linux kernel - CVE-2020-25656

Published: March 18, 2021


Vulnerability identifier: #VU51547
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2020-25656
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 gain access to sensitive information.

The vulnerability exists due to a use-after-free error in the way the console subsystem uses KDGKBSENT and KDSKBSENT IOCTLs. A local user can run a specially crafted program to trigger an out-of-bounds read and gain access to sensitive information.



Remediation

Install updates from vendor's website.

External links