Oracle Linux: (CVE-2017-9605) ELSA-2020-5962: Unbreakable Enterprise kernel security update
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)
- oracle-linux-upgrade-kernel-uek
- oracle-linux-upgrade-kernel-uek-debug
- oracle-linux-upgrade-kernel-uek-debug-devel
- oracle-linux-upgrade-kernel-uek-devel
- oracle-linux-upgrade-kernel-uek-doc
- oracle-linux-upgrade-kernel-uek-firmware
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