CVE-2026-68217None▾ SunlitIn 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…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
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.
Exploit-prediction probability, daily snapshots since Nov 6.
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: 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->fill_buf = pwc_get_next_fill_buf(pdev) usb_submit_urb(urbs[i>0], ..) -> 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->queued_bufs and stores it in pdev->fill_buf. The error path in start_streaming() only drains pdev->queued_bufs, so the buffer parked in pdev->fill_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/
Linux >= 885fe18f5542fe283a17f70583383c6cadcba1c3 < 97f3c15957ec7e6d249f05407ad947c0644df24dLinux >= 885fe18f5542fe283a17f70583383c6cadcba1c3 < a4afffd148991a826e8995362fb10cf8705c1130Linux >= 885fe18f5542fe283a17f70583383c6cadcba1c3 < eabe9a59640698137d7382d5b549e95dc37f7565Linux >= 885fe18f5542fe283a17f70583383c6cadcba1c3 < a56e7641e09bd80b976e944ae759109b86fd5b38Linux >= 885fe18f5542fe283a17f70583383c6cadcba1c3 < acc789b2173070638cad89c2b61d33ed338be0ddLinux >= 885fe18f5542fe283a17f70583383c6cadcba1c3 < 9afd605dcd96c7a45f338eded1de16679b30e1dfLinux >= 885fe18f5542fe283a17f70583383c6cadcba1c3 < 5d4812668b03f823b5044789d6aa77fe56b42587Linux >= 885fe18f5542fe283a17f70583383c6cadcba1c3 < 906e410dcffbbd99fb4081abab817a830033aa28Linux 3.1Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-99284Nonenet: skbuff: propagate shared-frag marker in skb_zerocopy()
CVE-2026-99283Nonenetfilter: conntrack: tcp: use UNACK timeout for non-closing RST packets
CVE-2026-99272Nonesmb: client: validate the data area in SMB2_read()
CVE-2026-99271NoneALSA: line6: Clear prev_fbuf on capture buffer release
CVE-2026-99273Noneksmbd: reserve space for the UTF-16 terminator in stream info
CVE-2026-99275Nonesmb: client: reject short SESSION_SETUP responses