Access Restriction Bypass Affecting torvalds/linux package, versions [,5.10.0)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.03% (6th percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3006582
  • published26 Jan 2022
  • disclosed15 Dec 2020
  • creditUnknown

Introduced: 15 Dec 2020

CVE-2020-27777  (opens in a new tab)
CWE-862  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 5.10.0 or higher.

Overview

Affected versions of this package are vulnerable to Access Restriction Bypass. A flaw was found in the way RTAS handled memory accesses in userspace to kernel communication. On a locked down (usually due to Secure Boot) guest system running on top of PowerVM or KVM hypervisors (pseries platform) a root like local user could use this flaw to further increase their privileges to that of a running kernel.

References

CVSS Base Scores

version 3.1