The Linux kernel media driver for NXP i.MX8 ISI devices had a flaw where mxc_isi_video_cleanup_streaming() was called unconditionally in mxc_isi_video_release(). This caused any release call, such as querying device capabilities with v4l2-ctl, to stop an active streaming queue unexpectedly. The issue was reproducible on i.MX8MP boards using gstreamer for video capture. The kernel trace shows warnings and error states triggered by this improper cleanup. The resolution moves streaming preparation and cleanup to the vb2 .prepare_streaming() and .unprepare_streaming() callbacks, allowing safe use of vb2_ioctl_streamon() and vb2_ioctl_streamoff() helpers and removing manual cleanup from the release function.

This vulnerability can cause active video streams on affected devices to be prematurely stopped or released when userspace queries device capabilities or performs release calls. This leads to error states and kernel warnings, potentially disrupting media capture applications relying on continuous streaming. The impact includes denial of service for video capture functionality and possible instability in affected systems.

A fix is available that moves streaming cleanup to the vb2 streaming operations, preventing unintended stream termination on release calls. Users should update to a Linux kernel version that includes this fix. Since this is a kernel driver issue, applying the official kernel patch or upgrading to a fixed kernel version is the recommended remediation. Patch status is not explicitly confirmed here; check the vendor or kernel mailing list advisories for the exact fixed version.