CVE-2026-68216High· 7.8▾ TwilightIn 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 star…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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").
Linux >= ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478 < d552852bf76b7dfb35b4593fc874d8dd2f1b1bf3Linux >= ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478 < 0362ae30b61b3053ee3095c1b8f179197ec4f539Linux >= ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478 < fa78e590852751d3ad32f33f6b4e210fe6ccbe9bLinux >= ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478 < f2f9fcacd81953dde6cb86312ab13ca13e689664Linux >= ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478 < 5d7cc2634c3843a1414a0f6407aa17f1f91dee60Linux >= ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478 < cb16b79a2be2cec9c3ebe4147490817c4d8b1de3Linux >= ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478 < a4f8f629983f643333e49df90557805469bcbb25Linux >= ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478 < 975b2ee20e569d47821e4f6c9761b4664d48a6a4Linux 3.5Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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