CVE-2022-48857

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

published July 16, 2024

CVSS
—
EPSS
0%
Percentile
10.0
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00205 · 10.0th percentile
Published
2024-07-16T12:25Z
EPSS history
Timeline
  • 16 JUL 12:25Z
    NFC: port100: fix use-after-free in port100_send_complete
    cvelistv5