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

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-22 · updated 2026-06-17

Description

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)

Affected products

Linux kernel: from 6.19 before 6.19.11; 7.0-rc1, 7.0-rc2, 7.0-rc3, 7.0-rc4, 7.0-rc5 — fixed in 6.19.11

How to fix

Upgrade to a fixed version: Linux kernel 6.19.11. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/60b0524bfb7d691ab378cdc788209f11cd34da89
https://git.kernel.org/stable/c/9da4f9964abcaeb6e19797d5e3b10faad338a786

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