Information Exposure Affecting torvalds/linux package, versions [,4.11.5)


Severity

Recommended
0.0
medium
0
10

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

Threat Intelligence

EPSS
0.11% (32nd percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3005867
  • published26 Jan 2022
  • disclosed13 Jun 2017
  • creditUnknown

Introduced: 13 Jun 2017

CVE-2017-9605  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 4.11.5 or higher.

Overview

Affected versions of this package are vulnerable to Information Exposure. The vmw_gb_surface_define_ioctl function (accessible via DRM_IOCTL_VMW_GB_SURFACE_CREATE) in drivers/gpu/drm/vmwgfx/vmwgfx_surface.c in the Linux kernel through 4.11.4 defines a backup_handle variable but does not give it an initial value. If one attempts to create a GB surface, with a previously allocated DMA buffer to be used as a backup buffer, the backup_handle variable does not get written to and is then later returned to user space, allowing local users to obtain sensitive information from uninitialized kernel memory via a crafted ioctl call.

References

CVSS Base Scores

version 3.1