CVE-2026-72092

Received Received - Intake

Null Pointer Dereference in Linux Kernel AMDXDNA Driver

Publication date: 2026-08-15

Last updated on: 2026-08-17

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: reject command submission on devices without a submit op amdxdna_cmd_submit() calls xdna->dev_info->ops->cmd_submit() unconditionally, but only aie2_dev_ops defines that callback. aie4_vf_ops (the AIE4 SR-IOV virtual function) does not, so a user AMDXDNA_EXEC_CMD ioctl on an AIE4 device reaches a NULL function-pointer call and oopses the kernel. AIE4 submits work through a mapped user queue and doorbell, not this ioctl path. Reject the submission early with -EOPNOTSUPP when the device provides no cmd_submit op, so the shared EXEC ioctl is a clean no-op on such devices. Found by 0sec automated security-research tooling (https://0sec.ai).

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-15

Last Modified

2026-08-17

Generated

2026-09-04

AI Q&A

2026-08-15

EPSS Evaluated

2026-09-03

NVD

CVE-2026-72092

EUVD

EUVD-2026-59050

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability is in the Linux kernel's AMD XDNA accelerator driver. It occurs when a user attempts to submit a command via the AMDXDNA_EXEC_CMD ioctl on an AIE4 device. The driver tries to call a function pointer that doesn't exist for AIE4 devices, leading to a NULL function-pointer dereference and kernel crash (oops). The fix rejects such submissions early with an error code.

Detection Guidance

This vulnerability affects the Linux kernel's AMD XDNA driver, specifically devices using AIE4 SR-IOV virtual functions. Detection requires checking kernel logs for NULL pointer dereference errors related to amdxdna_cmd_submit or AMDXDNA_EXEC_CMD ioctl failures on AIE4 devices.

Impact Analysis

If you use an AIE4 device with the affected Linux kernel, an attacker could trigger a kernel crash by sending a malicious AMDXDNA_EXEC_CMD ioctl. This could cause system instability, denial of service, or require a reboot to recover.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards. It is a Linux kernel issue causing a NULL function-pointer dereference in AMD XDNA devices, leading to a kernel oops. No data exposure or compliance violation is described.

Mitigation Strategies

Update the Linux kernel to a patched version that includes the fix for this issue. Avoid using AMDXDNA_EXEC_CMD ioctl on AIE4 devices until the patch is applied. Monitor kernel logs for related errors as an indicator of exploitation attempts.

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