CVE-2026-98148 Linux CVE debrief

Who should care

Defenders responsible for Linux kernel configurations, especially those utilizing the drm/gud module, should assess exposure and prioritize verification of device configurations. This includes operators, platform administrators, vulnerability management teams, and security teams who need to ensure that device rotations are properly supported to prevent potential WARN_ON triggers.

Why it matters

Defenders should assess exposure and prioritize verification of device configurations for the Linux kernel's drm/gud module due to a vulnerability related to rotation property creation.

• Verification of device rotation support is necessary to prevent potential WARN_ON triggers
• Configuration assessment is required to ensure GUD_ROTATION_0 is supported
• Patching priority should be set for devices with unknown rotation support

Technical summary

The Linux kernel's drm/gud module has a vulnerability related to the creation of rotation properties for devices. The issue arises when GUD_ROTATION_0 is not validated as present in the device's supported rotations, potentially triggering a WARN_ON in drm_plane_create_rotation_property(). The fix involves conditional creation of the rotation property based on GUD_ROTATION_0 support. Defenders should assess exposure and prioritize verification of device configurations, especially for systems utilizing the drm/gud module.

Defensive priority

Defenders should assess exposure and prioritize verification of device configurations, especially for systems utilizing the drm/gud module.

Recommended defensive actions

• Assess device configurations for drm/gud module usage
• Verify GUD_ROTATION_0 support in device rotations
• Prioritize patching for devices with unknown rotation support
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. However, specific versions affected and exploitation details are not provided, requiring verification from official sources. Defenders should verify device configurations, assess exposure, and prioritize patching for devices with unknown rotation support. The Linux kernel patch notes and source references provide additional context for understanding the vulnerability.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.