# CVE-2024-49910: drm/amd/display: Add NULL check for function pointer in dcn401_set_output_transfer_func

CVE-2024-49910 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-49910, released October 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-49910
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 21, 2024
- Weakness: NULL Pointer Dereference
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49910

## Description

In the Linux kernel, the following vulnerability has been resolved:  drm/amd/display: Add NULL check for function pointer in dcn401_set_output_transfer_func  This commit adds a null check for the set_output_gamma function pointer in the dcn401_set_output_transfer_func function. Previously, set_output_gamma was being checked for null, but then it was being dereferenced without any null check. This could lead to a null pointer dereference if set_output_gamma is null.  To fix this, we now ensure that set_output_gamma is not null before dereferencing it. We do this by adding a null check for set_output_gamma before the call to set_output_gamma.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.11.4-1 | [DEBIAN-CVE-2024-49910](https://patchblox.com/security/data/fix/linux/debian-cve-2024-49910.md) | Oct 21, 2024 |
| Linux | linux Debian 14 | 6.11.4-1 | [DEBIAN-CVE-2024-49910](https://patchblox.com/security/data/fix/linux/debian-cve-2024-49910.md) | Oct 21, 2024 |

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