CVE-2026-68216
In the Linux kernel, the following vulnerability has been resolved: media: pwc: Return queued buffers on start_streaming() failure The vb2 framework hands buffers to the driver via buf_queue() before calling start_streaming().
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.18%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: media: pwc: Return queued buffers on start_streaming() failure The vb2 framework hands buffers to the driver via buf_queue() before calling start_streaming(). If start_streaming() returns an error without first returning those buffers via vb2_buffer_done(), vb2_start_streaming() fires WARN_ON(owned_by_drv_count) and the queued buffers leak. pwc's start_streaming() had two early returns that hit this trap: -ENODEV when the USB device was already disconnected, and -ERESTARTSYS when mutex_lock_interruptible() was interrupted by a signal. Call the existing pwc_cleanup_queued_bufs() helper with VB2_BUF_STATE_QUEUED before returning (matching the state already used by the pwc_isoc_init() error path in the same function). This mirrors the uvcvideo fix in commit 4cf3b6fd54eb ("media: uvcvideo: Return queued buffers on start_streaming() failure").
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.18% probability · 7th percentile
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0362ae30b61b3053ee3095c1b8f179197ec4f539
- https://git.kernel.org/stable/c/5d7cc2634c3843a1414a0f6407aa17f1f91dee60
- https://git.kernel.org/stable/c/975b2ee20e569d47821e4f6c9761b4664d48a6a4
- https://git.kernel.org/stable/c/a4f8f629983f643333e49df90557805469bcbb25
- https://git.kernel.org/stable/c/cb16b79a2be2cec9c3ebe4147490817c4d8b1de3
- https://git.kernel.org/stable/c/d552852bf76b7dfb35b4593fc874d8dd2f1b1bf3
- https://git.kernel.org/stable/c/f2f9fcacd81953dde6cb86312ab13ca13e689664
- https://git.kernel.org/stable/c/fa78e590852751d3ad32f33f6b4e210fe6ccbe9b
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.