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Rewterz Threat Advisory – Linux Kernel privilege escalation

Severity

High

Analysis Summary

CVE-2021-26708

Linux Kernel could allow a local authenticated attacker to gain elevated privileges on the system, caused by multiple race conditions in the AF_VSOCK implementation due to wrong locking in net/vmw_vsock/af_vsock.c. By sending a specially-crafted request, an authenticated attacker could exploit this vulnerability to gain elevated privileges.

Impact

Gain Privileges

Affected Vendors

Linux

Affected Products

Linux Kernel 5.10

Remediation

Upgrade to the latest version of Linux Kernel (5.10.13 or later).

Linux Kernel GIT Repository