cve/2017/CVE-2017-9605.md

CVE-2017-9605

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.

POC

Reference

No PoCs from references.

Github

• https://github.com/thdusdl1219/CVE-Study
• https://github.com/vincent-deng/veracode-container-security-finding-parser