Information disclosure in Linux kernel - CVE-2021-21781

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Main Vulnerability Database Vulnerabilities #VU54395

Information disclosure in Linux kernel - CVE-2021-21781

Published: June 27, 2021


Vulnerability identifier: #VU54395
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-21781
CWE-ID: CWE-200
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 potentially sensitive information.

The vulnerability exists due to excessive data output in the ARM SIGPAGE functionality. A userland application can read the contents of the sigpage, which can leak kernel memory contents.


Remediation

Install updates from vendor's website.

External links