# CVE-2021-47173: linux: In the Linux kernel, the following vulnerability has been resolved:  misc/uss720: fix memory leak in uss720_probe  us...

CVE-2021-47173 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47173, released March 25, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-47173
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 25, 2024

## 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

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.14.6-1 | [DEBIAN-CVE-2021-47173](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47173.md) | Mar 25, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.14.6-1 | [DEBIAN-CVE-2021-47173](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47173.md) | Mar 25, 2024 |
| Linux | linux Debian 14 | 5.14.6-1 | [DEBIAN-CVE-2021-47173](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47173.md) | Mar 25, 2024 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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