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Rewterz Threat Advisory – Linux Kernel denial of service

Severity

Medium

Analysis Summary

CVE-2021-20200

Linux Kernel is vulnerable to a denial of service, caused by a use-after-free flaw due to a race problem while in detach_vmas_to_be_unmapped function in mm/mmap.c. By sending a specially-crafted request, a local authenticated attacker could exploit this vulnerability to cause the system to crash.

Impact

Denial of Service

Affected Vendors

Linux

Affected Products

  • Linux Kernel 5.4
  • Linux Kernel 5.7.0

Remediation

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

Linux Kernel GIT Repository