CVE-2021-47173

Advisory lineage Upstream: 0 Downstream: 9
Modified
Published: 25 Mar 2024, 09:16
Last modified:11 May 2026, 13:49

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

25 Mar 2024, 09:16
Published
Vulnerability first disclosed
11 May 2026, 13:49
Last Modified
Vulnerability information updated

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

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 3%

Techniques & Countermeasures

  • CWE-401•Missing Release of Memory after Effective Lifetime

    The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Affected Systems

  • linux•linux

    ≥ 0f36163d3abefbda1b21a330b3fdf3c2dc076d94, < 5f46b2410db2c8f26b8bb91b40deebf4ec184391 | ≥ 0f36163d3abefbda1b21a330b3fdf3c2dc076d94, < 7889c70e6173ef358f3cd7578db127a489035a42 | ≥ 0f36163d3abefbda1b21a330b3fdf3c2dc076d94, < bcb30cc8f8befcbdbcf7a016e4dfd4747c54a364 | ≥ 0f36163d3abefbda1b21a330b3fdf3c2dc076d94, < 386918878ce4cd676e4607233866e03c9399a46a | ≥ 0f36163d3abefbda1b21a330b3fdf3c2dc076d94, < 36b5ff1db1a4ef4fdbc2bae364344279f033ad88 | ≥ 0f36163d3abefbda1b21a330b3fdf3c2dc076d94, < 5394ae9d8c7961dd93807fdf1b12a1dde96b0a55 | ≥ 0f36163d3abefbda1b21a330b3fdf3c2dc076d94, < a3c3face38cb49932c62adcc1289914f1c742096 | ≥ 0f36163d3abefbda1b21a330b3fdf3c2dc076d94, < dcb4b8ad6a448532d8b681b5d1a7036210b622de | 2.6.14

  • linux•linux_kernel

    ≥ 2.6.14, < 4.4.271 | ≥ 4.5, < 4.9.271 | ≥ 4.10, < 4.14.235 | ≥ 4.15, < 4.19.193 | ≥ 4.20, < 5.4.124 | ≥ 5.5, < 5.10.42 | ≥ 5.11, < 5.12.9

References (8)