{"id":"DEBIAN-CVE-2026-68217","details":"In the Linux kernel, the following vulnerability has been resolved:  media: pwc: Drain fill_buf on start_streaming() failure  pwc_isoc_init() submits its isochronous URBs with usb_submit_urb(.., GFP_KERNEL) in a loop. After the first URB is submitted, its completion handler pwc_isoc_handler() can run on another CPU before the loop finishes:    start_streaming()     pwc_isoc_init()       usb_submit_urb(urbs[0], GFP_KERNEL)                                   pwc_isoc_handler(urbs[0])                                     pdev-\u003efill_buf =                                       pwc_get_next_fill_buf(pdev)       usb_submit_urb(urbs[i\u003e0], ..)  -\u003e fails       pwc_isoc_cleanup(pdev)           /* kills URBs */       return ret;     pwc_cleanup_queued_bufs(pdev, VB2_BUF_STATE_QUEUED)  pwc_get_next_fill_buf() detaches a buffer from pdev-\u003equeued_bufs and stores it in pdev-\u003efill_buf. The error path in start_streaming() only drains pdev-\u003equeued_bufs, so the buffer parked in pdev-\u003efill_buf is leaked. vb2_start_streaming() then triggers WARN_ON(owned_by_drv_count).  stop_streaming() already handles this since commit 80b0963e1698 (\"[media] pwc: fix WARN_ON\"), which added the fill_buf drain in the teardown path but not in the start_streaming() error path. Mirror that handling on failure so start_streaming() returns with no buffer owned by the driver.  Issue identified by automated review of the INV-003 series at https://sashiko.dev/","modified":"2026-09-08T17:00:25.125203798Z","published":"2026-08-10T13:20:09.657Z","upstream":["CVE-2026-68217"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-68217"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.187-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.129-1","6.1.133-1","6.1.135-1","6.1.137-1","6.1.139-1","6.1.140-1","6.1.147-1","6.1.148-1","6.1.153-1","6.1.158-1","6.1.159-1","6.1.162-1","6.1.164-1","6.1.170-1","6.1.170-2","6.1.170-3","6.1.172-1","6.1.174-1","6.1.176-1","6.1.177-1","6.1.180-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not 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