| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2022-49470: Bluetooth: btmtksdio: fix use-after-free at btmtksdio_recv_event |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| Bluetooth: btmtksdio: fix use-after-free at btmtksdio_recv_event |
| |
| We should not access skb buffer data anymore after hci_recv_frame was |
| called. |
| |
| [ 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 |
| [ 39.635498] hci_event_packet+0x894/0xca4 [bluetooth] |
| [ 39.635721] hci_rx_work+0x1c8/0x68c [bluetooth] |
| [ 39.635925] process_one_work+0x560/0xc5c |
| [ 39.635951] worker_thread+0x7ec/0xcc0 |
| [ 39.635970] kthread+0x2d0/0x3d0 |
| [ 39.635990] ret_from_fork+0x10/0x20 |
| [ 39.636021] The buggy address belongs to the object at ffffff80cf28a600 |
| which belongs to the cache kmalloc-512 of size 512 |
| [ 39.636039] The buggy address is located 13 bytes inside of |
| 512-byte region [ffffff80cf28a600, ffffff80cf28a800) |
| |
| The Linux kernel CVE team has assigned CVE-2022-49470 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.2 with commit 9aebfd4a2200ab8075e44379c758bccefdc589bb and fixed in 5.15.54 with commit b3cec8a42fcd11d05313c724f27e01b1db77522c |
| Issue introduced in 5.2 with commit 9aebfd4a2200ab8075e44379c758bccefdc589bb and fixed in 5.17.14 with commit 02ba31e09a26e8cd4582ac8e6163d80284997727 |
| Issue introduced in 5.2 with commit 9aebfd4a2200ab8075e44379c758bccefdc589bb and fixed in 5.18.3 with commit 01c6a899fa6be4f4cbf60c4f44f0f6691155415f |
| Issue introduced in 5.2 with commit 9aebfd4a2200ab8075e44379c758bccefdc589bb and fixed in 5.19 with commit 0fab6361c4ba17d1b43a991bef4238a3c1754d35 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2022-49470 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/bluetooth/btmtksdio.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/b3cec8a42fcd11d05313c724f27e01b1db77522c |
| https://git.kernel.org/stable/c/02ba31e09a26e8cd4582ac8e6163d80284997727 |
| https://git.kernel.org/stable/c/01c6a899fa6be4f4cbf60c4f44f0f6691155415f |
| https://git.kernel.org/stable/c/0fab6361c4ba17d1b43a991bef4238a3c1754d35 |
