Rewterz Threat Advisory –CVE-2021-38166 – Linux Kernel Integer Overflow Vulnerability

Severity

High

Analysis Summary

CVE-2021-38166

Linux Kernel could allow a local attacker to execute arbitrary code on the system, caused by an integer overflow and out-of-bounds write when many elements are placed in a single bucket in kernel/bpf/hashtab.c. By sending a specially crafted request, an attacker could exploit this vulnerability to execute arbitrary code on the system.

Impact

Unauthorized Access

Affected Vendors

Linux

Affected Products

Linux Kernel 5.13

Remediation

Upgrade to the latest version of Linux Kernel. available from the Linux Kernel GIT Repository.

https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=c4eb1f403243fc7bbb7de644db8587c03de36da6

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