CVE-2021-47173

misc/uss720: fix memory leak in uss720_probe

MEDIUM

5.5

CVSS Score

Published: March 25, 2024 at 09:16 AM UTC

Updated: June 17, 2026 at 04:16 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: misc/uss720: fix memory leak in uss720_probe uss720_probe forgets to decrease the refcount of usbdev in uss720_probe. Fix this by decreasing the refcount of usbdev by usb_put_dev. BUG: memory leak unreferenced object 0xffff888101113800 (size 2048): comm "kworker/0:1", pid 7, jiffies 4294956777 (age 28.870s) hex dump (first 32 bytes): ff ff ff ff 31 00 00 00 00 00 00 00 00 00 00 00 ....1........... 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 ................ backtrace: [<ffffffff82b8e822>] kmalloc include/linux/slab.h:554 [inline] [<ffffffff82b8e822>] kzalloc include/linux/slab.h:684 [inline] [<ffffffff82b8e822>] usb_alloc_dev+0x32/0x450 drivers/usb/core/usb.c:582 [<ffffffff82b98441>] hub_port_connect drivers/usb/core/hub.c:5129 [inline] [<ffffffff82b98441>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline] [<ffffffff82b98441>] port_event drivers/usb/core/hub.c:5509 [inline] [<ffffffff82b98441>] hub_event+0x1171/0x20c0 drivers/usb/core/hub.c:5591 [<ffffffff81259229>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275 [<ffffffff81259b19>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421 [<ffffffff81261228>] kthread+0x178/0x1b0 kernel/kthread.c:292 [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

2.6.14 ≤ v < 4.14.2352.6.14 ≤ v < 4.19.1932.6.14 ≤ v < 4.4.2712.6.14 ≤ v < 4.9.2712.6.14 ≤ v < 5.10.422.6.14 ≤ v < 5.12.92.6.14 ≤ v < 5.132.6.14 ≤ v < 5.4.1244.10 ≤ v < 4.14.2354.15 ≤ v < 4.19.1934.20 ≤ v < 5.4.1244.5 ≤ v < 4.9.2715.11 ≤ v < 5.12.95.5 ≤ v < 5.10.420f36163d3abefbda1b21a330b3fdf3c2dc076d942.6.14

Vendor states this is fixed in 36b5ff1db1a4ef4fdbc2bae364344279f033ad88 (fixed)

Vendor states this is fixed in 386918878ce4cd676e4607233866e03c9399a46a (fixed)

Vendor states this is fixed in 5394ae9d8c7961dd93807fdf1b12a1dde96b0a55 (fixed)

Vendor states this is fixed in 5f46b2410db2c8f26b8bb91b40deebf4ec184391 (fixed)

Vendor states this is fixed in 7889c70e6173ef358f3cd7578db127a489035a42 (fixed)

Vendor states this is fixed in a3c3face38cb49932c62adcc1289914f1c742096 (fixed)

Vendor states this is fixed in bcb30cc8f8befcbdbcf7a016e4dfd4747c54a364 (fixed)

Vendor states this is fixed in dcb4b8ad6a448532d8b681b5d1a7036210b622de (fixed)

Vendor states this is fixed in 2.6.14 (unaffected)

Vendor states this is fixed in 4.14.235 (unaffected)

Vendor states this is fixed in 4.19.193 (unaffected)

Vendor states this is fixed in 4.4.271 (unaffected)