CVE-2024-26979
Published: May 2, 2024Last modified: June 18, 2025
Description
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: Fix possible null pointer derefence with invalid contexts vmw_context_cotable can return either an error or a null pointer and its usage sometimes went unchecked. Subsequent code would then try to access either a null pointer or an error value. The invalid dereferences were only possible with malformed userspace apps 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 Lab who was the first person to discover it. Niels De Graef who reported it and helped to track down the poc.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Unknown (6.1.33-r0) |
| Stream | linux-lts | Unknown (6.1.33-r0) |
References
- 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