CVE-2022-48857

Summary

In the Linux kernel, the following vulnerability has been resolved:

NFC: port100: fix use-after-free in port100_send_complete

Syzbot reported UAF in port100_send_complete(). The root case is in missing usb_kill_urb() calls on error handling path of ->probe function.

port100_send_complete() accesses devm allocated memory which will be freed on probe failure. We should kill this urbs before returning an error from probe function to prevent reported use-after-free

Fail log:

BUG: KASAN: use-after-free in port100_send_complete+0x16e/0x1a0 drivers/nfc/port100.c:935 Read of size 1 at addr ffff88801bb59540 by task ksoftirqd/2/26 … Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x8d/0x303 mm/kasan/report.c:255 __kasan_report mm/kasan/report.c:442 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:459 port100_send_complete+0x16e/0x1a0 drivers/nfc/port100.c:935 __usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1670

…

Allocated by task 1255: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] ____kasan_kmalloc mm/kasan/common.c:515 [inline] ____kasan_kmalloc mm/kasan/common.c:474 [inline] __kasan_kmalloc+0xa6/0xd0 mm/kasan/common.c:524 alloc_dr drivers/base/devres.c:116 [inline] devm_kmalloc+0x96/0x1d0 drivers/base/devres.c:823 devm_kzalloc include/linux/device.h:209 [inline] port100_probe+0x8a/0x1320 drivers/nfc/port100.c:1502

Freed by task 1255: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free+0xff/0x140 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:236 [inline] __cache_free mm/slab.c:3437 [inline] kfree+0xf8/0x2b0 mm/slab.c:3794 release_nodes+0x112/0x1a0 drivers/base/devres.c:501 devres_release_all+0x114/0x190 drivers/base/devres.c:530 really_probe+0x626/0xcc0 drivers/base/dd.c:670

Affected Software

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

• https://git.kernel.org/stable/c/205c4ec78e71cbf561794e6043da80e7bae6790f
• https://git.kernel.org/stable/c/32e866ae5a7af590597ef4bcff8451bf96d5f980
• https://git.kernel.org/stable/c/b1db33d4e54bc35d8db96ce143ea0ef92e23d58e
• https://git.kernel.org/stable/c/cd2a5c0da0d1ddf11d1f84e9c9b1949f50f6e161
• https://git.kernel.org/stable/c/2b1c85f56512d49e43bc53741fce2f508cd90029
• https://git.kernel.org/stable/c/0e721b8f2ee5e11376dd55363f9ccb539d754b8a
• https://git.kernel.org/stable/c/7194737e1be8fdc89d2a9382bd2f371f7ee2eda8
• https://git.kernel.org/stable/c/f80cfe2f26581f188429c12bd937eb905ad3ac7b

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://git.kernel.org/stable/c/205c4ec78e71cbf561794e6043da80e7bae6790f
• https://git.kernel.org/stable/c/32e866ae5a7af590597ef4bcff8451bf96d5f980
• https://git.kernel.org/stable/c/b1db33d4e54bc35d8db96ce143ea0ef92e23d58e
• https://git.kernel.org/stable/c/cd2a5c0da0d1ddf11d1f84e9c9b1949f50f6e161
• https://git.kernel.org/stable/c/2b1c85f56512d49e43bc53741fce2f508cd90029
• https://git.kernel.org/stable/c/0e721b8f2ee5e11376dd55363f9ccb539d754b8a
• https://git.kernel.org/stable/c/7194737e1be8fdc89d2a9382bd2f371f7ee2eda8
• https://git.kernel.org/stable/c/f80cfe2f26581f188429c12bd937eb905ad3ac7b

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