Description
In the Linux kernel, the following vulnerability has been resolved:

drm/amdkfd: Fix missing authorization check in KFD_IOC_DBG_TRAP_DISABLE

Prevent unauthorized termination of active GPU debug sessions.
Previously, users with /dev/kfd access could terminate another process's
debug session without proper ownership or ptrace authorization.

(cherry picked from commit 4db4c5ffd5585b72622ecf6ffedf2da258ee23f5)
Published: 2026-08-28
Score: n/a
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability allows users with access to the /dev/kfd device to terminate another process's GPU debug session without verifying session ownership or requiring ptrace authorization. This missing authorization check enables malicious or misconfigured local users to disrupt active debugging operations, causing denial of service to debugging activities.

Affected Systems

The flaw exists in the Linux kernel DRM KFD subsystem and affects all kernel versions that lack the corresponding patch. The affected product is the Linux kernel, with no specific downstream version information provided in the data.

Risk and Exploitability

The vulnerability is a local issue exploitable by any user with write access to the /dev/kfd device. EPSS is not available and the issue is not listed in CISA KEV. The exploit requires only that the attacker has write access to the /dev/kfd character device, which is typically granted to privileged users; thus the risk is significant for environments that permit unrestricted access to this device.

Generated by OpenCVE AI on August 28, 2026 at 12:23 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Update the Linux kernel to a version that includes the patch corresponding to commit 4db4c5ffd5585b72622ecf6ffedf2da258ee23f5.
  • Restrict the /dev/kfd device node permissions so that only authorized users or groups can write to it; for example, set group ownership to a privileged group and apply 660 permissions.
  • Configure SELinux or AppArmor policies that deny ioctl calls on /dev/kfd to processes lacking the necessary capabilities, thereby enforcing proper access control.

Generated by OpenCVE AI on August 28, 2026 at 12:23 UTC.

Tracking

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Advisories

No advisories yet.

History

Fri, 28 Aug 2026 11:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-285

Fri, 28 Aug 2026 07:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix missing authorization check in KFD_IOC_DBG_TRAP_DISABLE Prevent unauthorized termination of active GPU debug sessions. Previously, users with /dev/kfd access could terminate another process's debug session without proper ownership or ptrace authorization. (cherry picked from commit 4db4c5ffd5585b72622ecf6ffedf2da258ee23f5)
Title drm/amdkfd: Fix missing authorization check in KFD_IOC_DBG_TRAP_DISABLE
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-28T06:53:05.851Z

Reserved: 2026-08-26T14:34:25.786Z

Link: CVE-2026-80703

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-28T08:16:55.850

Modified: 2026-08-28T08:16:55.850

Link: CVE-2026-80703

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-28T12:30:17Z

Weaknesses