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    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Thu, 01 Oct 2026 07:03:44 +0000</lastBuildDate>
    <item>
      <title>CVE-2022-49470 — Bluetooth: btmtksdio: fix use-after-free at btmtksdio_recv_event</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2022-49470</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: btmtksdio: fix use-after-free at btmtksdio_recv_event&lt;/p&gt;
&lt;p&gt;We should not access skb buffer data anymore after hci_recv_frame was
called.&lt;/p&gt;
&lt;p&gt;[   39.634809] BUG: KASAN: use-after-free in btmtksdio_recv_event+0x1b0
[   39.634855] Read of size 1 at addr ffffff80cf28a60d by task kworker
[   39.634962] Call trace:
[   39.634974]  dump_backtrace+0x0/0x3b8
[   39.634999]  show_stack+0x20/0x2c
[   39.635016]  dump_stack_lvl+0x60/0x78
[   39.635040]  print_address_description+0x70/0x2f0
[   39.635062]  kasan_report+0x154/0x194
[   39.635079]  __asan_report_load1_noabort+0x44/0x50
[   39.635099]  btmtksdio_recv_event+0x1b0/0x1c4
[   39.635129]  btmtksdio_txrx_work+0x6cc/0xac4
[   39.635157]  process_one_work+0x560/0xc5c
[   39.635177]  worker_thread+0x7ec/0xcc0
[   39.635195]  kthread+0x2d0/0x3d0
[   39.635215]  ret_from_fork+0x10/0x20
[   39.635247] Allocated by task 0:
[   39.635260] (stack is not available)
[   39.635281] Freed by task 2392:
[   39.635295]  kasan_save_stack+0x38/0x68
[   39.635319]  kasan_set_track+0x28/0x3c
[   39.635338]  kasan_set_free_info+0x28/0x4c
[   39.635357]  ____kasan_slab_free+0x104/0x150
[   39.635374]  __kasan_slab_free+0x18/0x28
[   39.635391]  slab_free_freelist_hook+0x114/0x248
[   39.635410]  kfree+0xf8/0x2b4
[   39.635427]  skb_free_head+0x58/0x98
[   39.635447]  skb_release_data+0x2f4/0x410
[   39.635464]  skb_release_all+0x50/0x60
[   39.635481]  kfree_skb+0xc8/0x25c
[   3…&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: btmtksdio: fix use-after-free at btmtksdio_recv_event&lt;/p&gt;
&lt;p&gt;We should not access skb buffer data anymore after hci_recv_frame was
called.&lt;/p&gt;
&lt;p&gt;[   39.634809] BUG: KASAN: use-after-free in btmtksdio_recv_event+0x1b0
[   39.634855] Read of size 1 at addr ffffff80cf28a60d by task kworker
[   39.634962] Call trace:
[   39.634974]  dump_backtrace+0x0/0x3b8
[   39.634999]  show_stack+0x20/0x2c
[   39.635016]  dump_stack_lvl+0x60/0x78
[   39.635040]  print_address_description+0x70/0x2f0
[   39.635062]  kasan_report+0x154/0x194
[   39.635079]  __asan_report_load1_noabort+0x44/0x50
[   39.635099]  btmtksdio_recv_event+0x1b0/0x1c4
[   39.635129]  btmtksdio_txrx_work+0x6cc/0xac4
[   39.635157]  process_one_work+0x560/0xc5c
[   39.635177]  worker_thread+0x7ec/0xcc0
[   39.635195]  kthread+0x2d0/0x3d0
[   39.635215]  ret_from_fork+0x10/0x20
[   39.635247] Allocated by task 0:
[   39.635260] (stack is not available)
[   39.635281] Freed by task 2392:
[   39.635295]  kasan_save_stack+0x38/0x68
[   39.635319]  kasan_set_track+0x28/0x3c
[   39.635338]  kasan_set_free_info+0x28/0x4c
[   39.635357]  ____kasan_slab_free+0x104/0x150
[   39.635374]  __kasan_slab_free+0x18/0x28
[   39.635391]  slab_free_freelist_hook+0x114/0x248
[   39.635410]  kfree+0xf8/0x2b4
[   39.635427]  skb_free_head+0x58/0x98
[   39.635447]  skb_release_data+0x2f4/0x410
[   39.635464]  skb_release_all+0x50/0x60
[   39.635481]  kfree_skb+0xc8/0x25c
[   3…&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2022-49470</guid>
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