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    <title>Most recent entries from all</title>
    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Tue, 29 Sep 2026 19:49:45 +0000</lastBuildDate>
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      <title>CVE-2026-68085 — Bluetooth: hci_uart: clear HCI_UART_SENDING when write_work is canceled</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-68085</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;Bluetooth: hci_uart: clear HCI_UART_SENDING when write_work is canceled&lt;/p&gt;
&lt;p&gt;HCI_UART_SENDING bit in tx_state means write_work is pending and blocks
queueing it again.  Currently this bit is not cleared when canceling the
work in hci_uart_close(), which blocks future writes when device is
reopened later if write_work was pending.&lt;/p&gt;
&lt;p&gt;Fix by clearing HCI_UART_SENDING when canceling the work.&lt;/p&gt;
&lt;p&gt;Also make clearing of tx_skb safe by using disable_work_sync +
enable_work instead of just cancel_work_sync.  hci_uart_flush() purges
the proto tx queue so we can cancel the pending write_work there,
instead of doing it just in hci_uart_close().  Re-enable and possibly
requeue the work after queue flush.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;Bluetooth: hci_uart: clear HCI_UART_SENDING when write_work is canceled&lt;/p&gt;
&lt;p&gt;HCI_UART_SENDING bit in tx_state means write_work is pending and blocks
queueing it again.  Currently this bit is not cleared when canceling the
work in hci_uart_close(), which blocks future writes when device is
reopened later if write_work was pending.&lt;/p&gt;
&lt;p&gt;Fix by clearing HCI_UART_SENDING when canceling the work.&lt;/p&gt;
&lt;p&gt;Also make clearing of tx_skb safe by using disable_work_sync +
enable_work instead of just cancel_work_sync.  hci_uart_flush() purges
the proto tx queue so we can cancel the pending write_work there,
instead of doing it just in hci_uart_close().  Re-enable and possibly
requeue the work after queue flush.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2026-68085</guid>
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