Access Restriction Bypass Affecting torvalds/linux package, versions [,5.2.15)


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3005465
  • published26 Jan 2022
  • disclosed13 Sept 2019
  • creditUnknown

Introduced: 13 Sep 2019

CVE-2019-15030  (opens in a new tab)
CWE-862  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 5.2.15 or higher.

Overview

Affected versions of this package are vulnerable to Access Restriction Bypass. In the Linux kernel through 5.2.14 on the powerpc platform, a local user can read vector registers of other users' processes via a Facility Unavailable exception. To exploit the venerability, a local user starts a transaction (via the hardware transactional memory instruction tbegin) and then accesses vector registers. At some point, the vector registers will be corrupted with the values from a different local Linux process because of a missing arch/powerpc/kernel/process.c check.

References

CVSS Scores

version 3.1