CVE-2026-68207 in Linux
Summary
by MITRE • 08/10/2026
In the Linux kernel, the following vulnerability has been resolved:
media: ti: vpe: unwind v4l2 device registration on probe error
If the vpe_top resource is missing, vpe_probe() returns -ENODEV after v4l2_device_register() has succeeded. Probe failures do not call the driver's remove callback, so the v4l2 device remains registered on that error path.
Route that failure through the existing v4l2_device_unregister() unwind label, matching the other errors after v4l2_device_register().
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Analysis
by VulDB Data Team • 08/10/2026
This vulnerability exists within the Linux kernel's video processing engine driver specifically affecting the ti-vpe module which handles video processing units. The issue manifests when the vpe_top resource cannot be acquired during device probe operations, causing a critical inconsistency in the driver's error handling mechanism. When the probe function encounters a missing resource condition, it returns -ENODEV after successfully registering the v4l2 device, creating a state where the device remains registered despite the probe failure.
The technical flaw stems from improper error path management within the vpe_probe() function where the driver fails to properly unwind the v4l2 device registration when encountering specific error conditions. This occurs because probe failures in the Linux kernel do not automatically invoke the remove callback, leaving the v4l2 device in a registered state even though the underlying hardware resources are unavailable or inaccessible. The vulnerability represents a classic resource leak scenario where kernel subsystems remain active and registered despite failed initialization attempts.
The operational impact of this vulnerability extends beyond simple resource leakage to potentially create system instability and security concerns within embedded video processing environments. When v4l2 devices remain registered after probe failures, they can interfere with subsequent device enumeration processes and may expose unexpected attack surfaces to malicious actors attempting to exploit the inconsistent driver state. This behavior particularly affects systems relying on the Texas Instruments Video Processing Engine for multimedia applications, where proper device lifecycle management is critical for system reliability.
This issue aligns with CWE-459 which describes incomplete cleanup and CWE-704 which covers incorrect function or method calls in kernel drivers. The vulnerability also relates to ATT&CK technique T1068 which involves exploiting vulnerabilities in the operating system to gain elevated privileges, as improper device registration could potentially provide attackers with additional attack vectors. The fix implements proper error path handling by routing the failure through the existing v4l2_device_unregister() unwind label, ensuring consistent behavior across all error conditions following v4l2_device_register() calls and maintaining proper resource management throughout the driver's lifecycle.
The mitigation strategy involves applying the kernel patch that ensures all error paths after v4l2_device_register() properly clean up registered resources through the established v4l2_device_unregister() mechanism. This approach maintains consistency with existing error handling patterns within the Linux kernel's V4L2 subsystem and prevents the accumulation of orphaned device registrations that could lead to system instability or security issues in embedded multimedia processing environments where the ti-vpe driver operates.