### [CVE-2024-26979](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26979)
![](https://img.shields.io/static/v1?label=Product&message=Linux&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=9c079b8ce8bf%3C%20c560327d900b%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

In the Linux kernel, the following vulnerability has been resolved:drm/vmwgfx: Fix possible null pointer derefence with invalid contextsvmw_context_cotable can return either an error or a null pointer and itsusage sometimes went unchecked. Subsequent code would then try to accesseither a null pointer or an error value.The invalid dereferences were only possible with malformed userspaceapps which never properly initialized the rendering contexts.Check the results of vmw_context_cotable to fix the invalid derefs.Thanks:ziming zhang(@ezrak1e) from Ant Group Light-Year Security Labwho was the first person to discover it.Niels De Graef who reported it and helped to track down the poc.

### POC

#### Reference
- https://git.kernel.org/stable/c/07c3fe923ff7eccf684fb4f8c953d0a7cc8ded73
- https://git.kernel.org/stable/c/517621b7060096e48e42f545fa6646fc00252eac
- https://git.kernel.org/stable/c/585fec7361e7850bead21fada49a7fcde2f2e791
- https://git.kernel.org/stable/c/899e154f9546fcae18065d74064889d08fff62c2
- https://git.kernel.org/stable/c/9cb3755b1e3680b720b74dbedfac889e904605c7
- https://git.kernel.org/stable/c/c560327d900bab968c2e1b4cd7fa2d46cd429e3d
- https://git.kernel.org/stable/c/ff41e0d4f3fa10d7cdd7d40f8026bea9fcc8b000

#### Github
No PoCs found on GitHub currently.