CVE-2026-98389 Linux CVE debrief

Who should care

Linux administrators and users, kernel maintainers, and security teams responsible for Linux kernel management should assess exposure, verify inventory, and apply patches or compensating controls as needed. They should also monitor for potential GPU reset issues and assess system stability. Additionally, they should prioritize patching or mitigation for affected systems and review compensating controls for exposed systems.

Why it matters

Linux kernel vulnerability CVE-2026-98389 resolved, gfx switch_power_profile invoked during GPU reset causes assert error; assess exposure, verify inventory, and apply patches or compensating controls as needed.

• Verify Linux kernel versions for exposure and apply patches or compensating controls as needed.
• Monitor for potential GPU reset issues and assess system stability.
• Assess inventory and prioritize patching or mitigation for affected systems.

Technical summary

The Linux kernel vulnerability CVE-2026-98389 was resolved, where gfx switch_power_profile was being invoked during GPU reset, causing an assert error due to register access without releasing the GPU reset semaphore. Affected Linux kernel versions include those prior to 6.18.53 and 7.2.7. The vulnerability was addressed through specific commits in the Linux kernel. Defenders should assess Linux kernel versions for exposure and apply patches or compensating controls as needed to mitigate potential operational impacts.

Defensive priority

Assess Linux kernel versions for exposure, verify inventory, and apply patches or compensating controls as needed.

Recommended defensive actions

• Assess Linux kernel versions for exposure
• Verify inventory and apply patches or compensating controls as needed
• Monitor for potential GPU reset issues
• 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 source item provide details on the vulnerability, including affected Linux kernel versions and commits that address the issue. The vulnerability was resolved through specific commits in the Linux kernel. Defenders should verify Linux kernel versions for exposure and review system stability. The source item provides additional information on the vulnerability, and the CVE Program record offers official CVE metadata.

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.