CVE-2026-53135
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix NULL deref and buffer over-read in SDP debugfs [Why & How] dp_sdp_message_debugfs_write() dereferences connector->base.state->crtc without checking for NULL.
Does this matter?
Lower severity and a low EPSS score (0.16%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix NULL deref and buffer over-read in SDP debugfs [Why & How] dp_sdp_message_debugfs_write() dereferences connector->base.state->crtc without checking for NULL. A connector can be connected but not bound to any CRTC (e.g. after hot-plug before the next atomic commit), causing a kernel crash when writing to the sdp_message debugfs node. The function also ignores the user-provided size argument and always passes 36 bytes to copy_from_user(), reading past the user buffer when size < 36. Fix both issues by: - Returning -ENODEV when connector->base.state or state->crtc is NULL - Clamping write_size to min(size, sizeof(data)) (cherry picked from commit 6ab4c36a522842ff70474a1c0af2e40e50fc8300)
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.16% probability · 6th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/7ae95c0275c330b5dbae806f8e431720edad776fPatch
- https://git.kernel.org/stable/c/7fc4fab4acc307ad2903312c195872b2953d32c3Patch
- https://git.kernel.org/stable/c/a2de1d71891a038a9346b2c1a72b88c8350f2479Patch
- https://git.kernel.org/stable/c/adf67034b1f61f7119295208085bfd43f85f56afPatch
- https://git.kernel.org/stable/c/b781f90a9528555c709e59789550893581ef0be4Patch
- https://git.kernel.org/stable/c/bb6f705b73b5f191f14ad004e2c8c4b615806187Patch
- https://git.kernel.org/stable/c/c90954cdea4d6998ec345de0d840d030c145b89ePatch
- https://git.kernel.org/stable/c/ee9cfcf77a8e8af637396dc00966df5f701e661cPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.