CVE-2026-68380
Received Received - Intake

Use-After-Free in Linux Kernel AMDXDNA Driver

Publication date: 2026-08-10

Last updated on: 2026-08-10

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: Fix use-after-free of mm_struct in job scheduler amdxdna_cmd_submit() stores current->mm in job->mm without holding any reference. aie2_sched_job_run() later access job->mm from the DRM scheduler worker thread. With only a raw pointer and no structural reference, the mm_struct can be freed before the scheduler runs the job. Fix this by calling mmgrab() to hold a structural mm_count reference for the lifetime of the job, paired with mmdrop() in every cleanup path.

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Meta Information

Published
2026-08-10
Last Modified
2026-08-10
Generated
2026-08-10
AI Q&A
2026-08-10
EPSS Evaluated
N/A
NVD
CVE-2026-68380
EUVD
EUVD-2026-55566

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel involves a use-after-free issue in the AMD XDNA accelerator driver. The problem occurs when the kernel stores a pointer to the current process's memory management structure (mm_struct) in a job object without holding a reference. Later, when the job runs in a different thread, the memory structure may have been freed, leading to potential crashes or security issues.

Detection Guidance

This vulnerability is specific to the Linux kernel's amdxdna driver and involves a use-after-free in the job scheduler. Detection requires checking kernel logs for crashes or errors related to amdxdna or DRM scheduler. Monitor for kernel oops messages or system hangs during GPU workloads.

Impact Analysis

This vulnerability could cause system instability, including crashes or unexpected behavior, due to accessing freed memory. It may also lead to privilege escalation if exploited by a local attacker to gain unauthorized access or execute arbitrary code in the kernel context.

Mitigation Strategies

Apply the kernel patch that fixes this issue by updating to a version containing the fix. If immediate patching is not possible, disable the amdxdna driver or avoid using GPU acceleration features until patched. Monitor vendor advisories for updates.

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