CVE-2026-68103: drm/amdgpu: reject mapping a reserved doorbell to a new queue

CSIRTS triage

What

The amdgpu driver fails to reject mapping reserved doorbells to new queues, allowing resource collision.

Who is affected

Systems with AMD GPUs in affected Linux kernel versions.

Urgency

Medium; CVSS 4.4 indicates lower priority but requires remediation.

Action

Update to a patched Linux kernel version that fixes CVE-2026-68103.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

medium — CVSS 4.4

Published

2026-08-11

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68103

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

• Low exploitation riskCVE-2026-681030.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 1% of all EPSS-scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• high[NEW] [high] Linux Kernel: Multiple vulnerabilitiescert-bund
• highCVE-2026-68103: In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: reject mapping…nvd

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