CVE-2025-39714 – media: usbtv: Lock resolution while streaming

The following table lists the changes that have been made to the
CVE-2025-39714 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Sep. 05, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved:

    media: usbtv: Lock resolution while streaming

    When an program is streaming (ffplay) and another program (qv4l2)
    changes the TV standard from NTSC to PAL, the kernel crashes due to trying
    to copy to unmapped memory.

    Changing from NTSC to PAL increases the resolution in the usbtv struct,
    but the video plane buffer isn’t adjusted, so it overflows.

    [hverkuil: call vb2_is_busy instead of vb2_is_streaming]

    Added Reference https://git.kernel.org/stable/c/3d83d0b5ae5045a7a246ed116b5f6c688a12f9e9
    Added Reference https://git.kernel.org/stable/c/5427dda195d6baf23028196fd55a0c90f66ffa61
    Added Reference https://git.kernel.org/stable/c/7e40e0bb778907b2441bff68d73c3eb6b6cd319f
    Added Reference https://git.kernel.org/stable/c/9f886d21e235c4bd038cb20f6696084304197ab3
    Added Reference https://git.kernel.org/stable/c/c35e7c7a004ef379a1ae7c7486d4829419acad1d
    Added Reference https://git.kernel.org/stable/c/c3d75524e10021aa5c223d94da4996640aed46c0
    Added Reference https://git.kernel.org/stable/c/ee7bade8b9244834229b12b6e1e724939bedd484
    Added Reference https://git.kernel.org/stable/c/ef9b3c22405192afaa279077ddd45a51db90b83d
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