# CVE-2021-47180: linux: In the Linux kernel, the following vulnerability has been resolved:  NFC: nci: fix memory leak in nci_allocate_device...

CVE-2021-47180 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47180, released March 25, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-47180
- 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:  NFC: nci: fix memory leak in nci_allocate_device  nfcmrvl_disconnect fails to free the hci_dev field in struct nci_dev. Fix this by freeing hci_dev in nci_free_device.  BUG: memory leak unreferenced object 0xffff888111ea6800 (size 1024):   comm "kworker/1:0", pid 19, jiffies 4294942308 (age 13.580s)   hex dump (first 32 bytes):     00 00 00 00 00 00 00 00 00 60 fd 0c 81 88 ff ff  .........`......     00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................   backtrace:     [<000000004bc25d43>] kmalloc include/linux/slab.h:552 [inline]     [<000000004bc25d43>] kzalloc include/linux/slab.h:682 [inline]     [<000000004bc25d43>] nci_hci_allocate+0x21/0xd0 net/nfc/nci/hci.c:784     [<00000000c59cff92>] nci_allocate_device net/nfc/nci/core.c:1170 [inline]     [<00000000c59cff92>] nci_allocate_device+0x10b/0x160 net/nfc/nci/core.c:1132     [<00000000006e0a8e>] nfcmrvl_nci_register_dev+0x10a/0x1c0 drivers/nfc/nfcmrvl/main.c:153     [<000000004da1b57e>] nfcmrvl_probe+0x223/0x290 drivers/nfc/nfcmrvl/usb.c:345     [<00000000d506aed9>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396     [<00000000bc632c92>] really_probe+0x159/0x4a0 drivers/base/dd.c:554     [<00000000f5009125>] driver_probe_device+0x84/0x100 drivers/base/dd.c:740     [<000000000ce658ca>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:846     [<000000007067d05f>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431     [<00000000f8e13372>] __device_attach+0x122/0x250 drivers/base/dd.c:914     [<000000009cf68860>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491     [<00000000359c965a>] device_add+0x5be/0xc30 drivers/base/core.c:3109     [<00000000086e4bd3>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164     [<00000000ca036872>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238     [<00000000d40d36f6>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293     [<00000000bc632c92>] really_probe+0x159/0x4a0 drivers/base/dd.c:554

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.14.6-1 | [DEBIAN-CVE-2021-47180](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47180.md) | Mar 25, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.14.6-1 | [DEBIAN-CVE-2021-47180](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47180.md) | Mar 25, 2024 |
| Linux | linux Debian 14 | 5.14.6-1 | [DEBIAN-CVE-2021-47180](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47180.md) | Mar 25, 2024 |

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Data as of 2026-11-09T01:18:40Z 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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