# CVE-2026-31460: drm/amd/display: check if ext_caps is valid in BL setup

Status: published. Published: 2026-04-22. Updated: 2026-11-05.

In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: check if ext_caps is valid in BL setup

LVDS connectors don't have extended backlight caps so check
if the pointer is valid before accessing it.

(cherry picked from commit 3f797396d7f4eb9bb6eded184bbc6f033628a6f6)

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 1454642960b0a4fafd48b08919d39350ee2ac372; < 60b0524bfb7d691ab378cdc788209f11cd34da89 (affected, git); ≥ 1454642960b0a4fafd48b08919d39350ee2ac372; < 9da4f9964abcaeb6e19797d5e3b10faad338a786 (affected, git). Source: CNA: Linux
- Linux / Linux: 6.19 (affected); ≥ 0; < 6.19 (unaffected, semver); ≥ 6.19.11; ≤ 6.19.* (unaffected, semver); ≥ 7.0; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.11% as of 2026-11-05; percentile 1.16%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/60b0524bfb7d691ab378cdc788209f11cd34da89 (CNA: Linux)

- https://git.kernel.org/stable/c/9da4f9964abcaeb6e19797d5e3b10faad338a786 (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-31460; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-31460; retrieved 2026-11-05; source updated Not reported

Revision: 9ed0fff60d9d1cca318099b3f8c230b3b2788e3bfc4f01e3eda307dec742850d

Canonical: https://y2.dev/cve/CVE-2026-31460

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