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A medium severity vulnerability in the Linux kernel's drm/sun4i backend was fixed by adding a missing error pointer check. The function drm_atomic_get_plane_state() could return an error pointer that was not checked, leading to a possible null pointer dereference and kernel crash.

The vulnerability in the Linux kernel drm/sun4i backend arises because the function drm_atomic_get_plane_state() can return an error pointer, but this return value was not checked before dereferencing. This flaw was detected by the Smatch static analysis tool in the sun4i_backend_atomic_check() function at line 496 of sun4i_backend.c. The missing check could lead to dereferencing an error pointer, causing a kernel crash (denial of service). The issue is tracked as CVE-2026-53066 and is categorized under CWE-476 (NULL Pointer Dereference).

Detailed information about In the Linux kernel, the following vulnerability has been resolved: drm/sun4i: backend: fix error pointer dereference The function… (

In the Linux kernel, the following vulnerability has been resolved: drm/sun4i: backend: fix error pointer dereference The function… (CVE-2026-53066) - Live Threat Intelligence - Threat Radar | OffSeq.com

In the Linux kernel, the following vulnerability has been resolved: drm/sun4i: backend: fix error pointer dereference The function… (CVE-2026-53066)

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In the Linux kernel, the following vulnerability has been resolved: drm/sun4i: backend: fix error pointer dereference The function drm_atomic_get_plane_state() can return an error pointer and is not checked for it. Add error pointer check. Detected by Smatch: drivers/gpu/drm/sun4i/sun4i_backend.c:496 sun4i_backend_atomic_check() error: 'plane_state' dereferencing possible ERR_PTR()

The Linux kernel vulnerability CVE-2026-53066 involves the drm/sun4i backend where the function drm_atomic_get_plane_state() may return an error pointer that is not properly checked before dereferencing. This can cause an error pointer dereference leading to potential denial of service. The issue was detected by static analysis (Smatch) in the sun4i_backend_atomic_check() function. The vulnerability has been addressed in patched kernel versions. The CVSS 3.1 score is 5.5 (medium severity) with local attack vector, low attack complexity, requiring low privileges, no user interaction, unchanged scope, no confidentiality or integrity impact, but high availability impact.

Detailed information about UBUNTU-CVE-2026-53066 affecting null linux-hwe-edge. Get real-time updates, technical details, and mitigation strategies.

UBUNTU-CVE-2026-53066 - Live Threat Intelligence - Threat Radar | OffSeq.com

Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: drm/sun4i: backend: fix error pointer dereference The function… (CVE-2026-53066)


In the Linux kernel, the following vulnerability has been resolved: drm/sun4i: backend: fix error pointer dereference The function… (CVE-2026-53066)CVE-2026-53066 0 A medium severity vulnerability in the Linux kernel's drm/sun4i backend was fixed by adding a missing error pointer check. The function drm_atomic_get_plane_state() could return an error pointer that was not checked, leading to a possible null pointer dereference and kernel crash. MediumVulnerability#gcve #osv #ghsa-7qff-cmg5-8pwm Join the discussion	GCVE Database	06/24/2026, 18:32:45 UTC Added: 07/21/2026, 19:58:00 UTC
Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: drm/sun4i: backend: fix error pointer dereference The function… (CVE-2026-53066)CVE-2026-53066 0 In the Linux kernel, the following vulnerability has been resolved: drm/sun4i: backend: fix error pointer dereference The function drm_atomic_get_plane_state() can return an error pointer and is not checked for it. Add error pointer check. Detected by Smatch: drivers/gpu/drm/sun4i/sun4i_backend.c:496 sun4i_backend_atomic_check() error: 'plane_state' dereferencing possible ERR_PTR() MediumVulnerability#gcve #osv #ubuntu-cve-2026-53066 Join the discussion	GCVE Database	06/24/2026, 17:17:00 UTC Added: 07/17/2026, 10:17:34 UTC

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