# CVE-2024-26914: drm/amd/display: fix incorrect mpc_combine array size

CVE-2024-26914 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-26914, released April 17, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2024-26914
- Priority: High
- CVSS: 7.8 (Moderate)
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 17, 2024
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-26914

## Description

In the Linux kernel, the following vulnerability has been resolved:  drm/amd/display: fix incorrect mpc_combine array size  [why] MAX_SURFACES is per stream, while MAX_PLANES is per asic. The mpc_combine is an array that records all the planes per asic. Therefore MAX_PLANES should be used as the array size. Using MAX_SURFACES causes array overflow when there are more than 3 planes.  [how] Use the MAX_PLANES for the mpc_combine array size.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.7.7-1 | [DEBIAN-CVE-2024-26914](https://patchblox.com/security/data/fix/linux/debian-cve-2024-26914.md) | Apr 17, 2024 |
| Linux | linux Debian 14 | 6.7.7-1 | [DEBIAN-CVE-2024-26914](https://patchblox.com/security/data/fix/linux/debian-cve-2024-26914.md) | Apr 17, 2024 |

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