5.5
MEDIUM
CVE-2021-47173
Linux Kernel usb USBDeviceMemoryLeak Vulnerability
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

INFO

Published Date :

March 25, 2024, 10:15 a.m.

Last Modified :

May 16, 2024, 9:19 p.m.

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Remotely Exploitable :

No

Impact Score :

3.6

Exploitability Score :

1.8
Affected Products

The following products are affected by CVE-2021-47173 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-47173.

URL Resource
https://git.kernel.org/stable/c/36b5ff1db1a4ef4fdbc2bae364344279f033ad88 Patch
https://git.kernel.org/stable/c/386918878ce4cd676e4607233866e03c9399a46a Patch
https://git.kernel.org/stable/c/5394ae9d8c7961dd93807fdf1b12a1dde96b0a55 Patch
https://git.kernel.org/stable/c/5f46b2410db2c8f26b8bb91b40deebf4ec184391 Patch
https://git.kernel.org/stable/c/7889c70e6173ef358f3cd7578db127a489035a42 Patch
https://git.kernel.org/stable/c/a3c3face38cb49932c62adcc1289914f1c742096 Patch
https://git.kernel.org/stable/c/bcb30cc8f8befcbdbcf7a016e4dfd4747c54a364 Patch
https://git.kernel.org/stable/c/dcb4b8ad6a448532d8b681b5d1a7036210b622de Patch

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-47173 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-47173 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 28, 2024

    Action Type Old Value New Value
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 17, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    May. 16, 2024

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://git.kernel.org/stable/c/36b5ff1db1a4ef4fdbc2bae364344279f033ad88 No Types Assigned https://git.kernel.org/stable/c/36b5ff1db1a4ef4fdbc2bae364344279f033ad88 Patch
    Changed Reference Type https://git.kernel.org/stable/c/386918878ce4cd676e4607233866e03c9399a46a No Types Assigned https://git.kernel.org/stable/c/386918878ce4cd676e4607233866e03c9399a46a Patch
    Changed Reference Type https://git.kernel.org/stable/c/5394ae9d8c7961dd93807fdf1b12a1dde96b0a55 No Types Assigned https://git.kernel.org/stable/c/5394ae9d8c7961dd93807fdf1b12a1dde96b0a55 Patch
    Changed Reference Type https://git.kernel.org/stable/c/5f46b2410db2c8f26b8bb91b40deebf4ec184391 No Types Assigned https://git.kernel.org/stable/c/5f46b2410db2c8f26b8bb91b40deebf4ec184391 Patch
    Changed Reference Type https://git.kernel.org/stable/c/7889c70e6173ef358f3cd7578db127a489035a42 No Types Assigned https://git.kernel.org/stable/c/7889c70e6173ef358f3cd7578db127a489035a42 Patch
    Changed Reference Type https://git.kernel.org/stable/c/a3c3face38cb49932c62adcc1289914f1c742096 No Types Assigned https://git.kernel.org/stable/c/a3c3face38cb49932c62adcc1289914f1c742096 Patch
    Changed Reference Type https://git.kernel.org/stable/c/bcb30cc8f8befcbdbcf7a016e4dfd4747c54a364 No Types Assigned https://git.kernel.org/stable/c/bcb30cc8f8befcbdbcf7a016e4dfd4747c54a364 Patch
    Changed Reference Type https://git.kernel.org/stable/c/dcb4b8ad6a448532d8b681b5d1a7036210b622de No Types Assigned https://git.kernel.org/stable/c/dcb4b8ad6a448532d8b681b5d1a7036210b622de Patch
    Added CWE NIST CWE-401
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.14 up to (excluding) 4.4.271 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.5 up to (excluding) 4.9.271 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.235 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.193 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.124 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.42 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.12.9
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Mar. 25, 2024

    Action Type Old Value New Value
    Added 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
    Added Reference kernel.org https://git.kernel.org/stable/c/5f46b2410db2c8f26b8bb91b40deebf4ec184391 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/7889c70e6173ef358f3cd7578db127a489035a42 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/bcb30cc8f8befcbdbcf7a016e4dfd4747c54a364 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/386918878ce4cd676e4607233866e03c9399a46a [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/36b5ff1db1a4ef4fdbc2bae364344279f033ad88 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/5394ae9d8c7961dd93807fdf1b12a1dde96b0a55 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/a3c3face38cb49932c62adcc1289914f1c742096 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/dcb4b8ad6a448532d8b681b5d1a7036210b622de [No types assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-47173 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-47173 weaknesses.

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
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