CVE-2017-7261

Published: 24 March 2017

The vmw_surface_define_ioctl function in drivers/gpu/drm/vmwgfx/vmwgfx_surface.c in the Linux kernel through 4.10.5 does not check for a zero value of certain levels data, which allows local users to cause a denial of service (ZERO_SIZE_PTR dereference, and GPF and possibly panic) via a crafted ioctl call for a /dev/dri/renderD* device.

From the Ubuntu Security Team

It was discovered that a NULL pointer dereference existed in the Direct Rendering Manager (DRM) driver for VMWare devices in the Linux kernel. A local attacker could use this to cause a denial of service (system crash).

Notes

android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.10 and earlier preview kernels
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support

Status

Severity score breakdown

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7261
• http://marc.info/?t=149037004200005&r=1&w=2
• https://bugzilla.redhat.com/show_bug.cgi?id=1435719
• https://lists.freedesktop.org/archives/dri-devel/2017-March/136814.html
• https://ubuntu.com/security/notices/USN-3293-1
• https://ubuntu.com/security/notices/USN-3291-1
• https://ubuntu.com/security/notices/USN-3291-2
• https://ubuntu.com/security/notices/USN-3291-3
• https://ubuntu.com/security/notices/USN-3361-1
• https://ubuntu.com/security/notices/USN-3406-1
• https://ubuntu.com/security/notices/USN-3406-2
• NVD
• Launchpad
• Debian