Rewterz Threat Advisory – CVE-2021-21781 – Linux Kernel Information Disclosure

Severity

Medium

Analysis Summary

CVE-2021-21781

Linux Kernel could allow an attacker to obtain sensitive information, caused by a flaw in the ARM SIGPAGE function. By executing a specially-crafted application, an attacker could exploit this vulnerability to obtain the contents in the kernel memory, and use this information to launch further attacks against the affected system.

Impact

• Information Theft

Affected Vendors

Linux

Affected Products

• Linux Kernel 5.4.66
• Linux Kernel 5.4.54

Remediation

Refer to Linux Kernel GIT Repository for patch, upgrade or suggested workaround information.

https://github.com/torvalds/linux