cve/2020/CVE-2020-7053.md

### [CVE-2020-7053](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-7053)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

In the Linux kernel 4.14 longterm through 4.14.165 and 4.19 longterm through 4.19.96 (and 5.x before 5.2), there is a use-after-free (write) in the i915_ppgtt_close function in drivers/gpu/drm/i915/i915_gem_gtt.c, aka CID-7dc40713618c. This is related to i915_gem_context_destroy_ioctl in drivers/gpu/drm/i915/i915_gem_context.c.

### POC

#### Reference
- http://packetstormsecurity.com/files/156455/Kernel-Live-Patch-Security-Notice-LSN-0063-1.html
- http://packetstormsecurity.com/files/156455/Kernel-Live-Patch-Security-Notice-LSN-0063-1.html
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1859522
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1859522
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2
- https://lore.kernel.org/stable/20200114183937.12224-1-tyhicks@canonical.com
- https://lore.kernel.org/stable/20200114183937.12224-1-tyhicks@canonical.com
- https://usn.ubuntu.com/4287-2/
- https://usn.ubuntu.com/4287-2/

#### Github
- https://github.com/ARPSyndicate/cvemon