VULNERABILITY

Debian: CVE-2017-9605: linux -- security update

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Debian: CVE-2017-9605: linux -- security update

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:C/I:N/A:N)
Published
06/13/2017
Created
07/25/2018
Added
08/07/2017
Modified
11/27/2024

Description

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.

Solution(s)

  • debian-upgrade-linux

References

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