CVE-2021-47180

NFC: nci: fix memory leak in nci_allocate_device

Severity Score

"-"

*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

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

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: NFC: nci: corrige la pérdida de memoria en nci_allocate_device nfcmrvl_disconnect no logra liberar el campo hci_dev en la estructura nci_dev. Solucione este problema liberando hci_dev en nci_free_device. ERROR: pérdida de memoria, objeto sin referencia 0xffff888111ea6800 (tamaño 1024): comunicación "kworker/1:0", pid 19, jiffies 4294942308 (edad 13.580 s) volcado hexadecimal (primeros 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 ............. ... seguimiento: [<000000004bc25d43>] kmalloc include/linux/slab.h:552 [en línea] [<000000004bc25d43>] kzalloc include/linux/slab.h:682 [en línea] [<000000004bc25d43>] nci_hci_allocate+0x21/ 0xd0 net/nfc/nci/hci.c:784 [<00000000c59cff92>] nci_allocate_device net/nfc/nci/core.c:1170 [en línea] [<00000000c59cff92>] nci_allocate_device+0x10b/0x160 net/nfc/nci/core. c:1132 [<00000000006e0a8e>] nfcmrvl_nci_register_dev+0x10a/0x1c0 controladores/nfc/nfcmrvl/main.c:153 [<000000004da1b57e>] nfcmrvl_probe+0x223/0x290 controladores/nfc/nfcmr vl/usb.c:345 [<00000000d506aed9>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<00000000bc632c92>] very_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 controladores/base/dd.c:846 [<000000007067d05f>] bus_for_each_drv+0xb7/0x100 controladores/base/bus.c:431 [<00000000f8e1337 2>] __device_attach+0x122 /0x250 controladores/base/dd.c:914 [<000000009cf68860>] bus_probe_device+0xc6/0xe0 controladores/base/bus.c:491 [<00000000359c965a>] dispositivo_add+0x5be/0xc30 controladores/base/core.c:3109 [ <00000000086e4bd3>] usb_set_configuration+0x9d9/0xb90 controladores/usb/core/message.c:2164 [<00000000ca036872>] usb_generic_driver_probe+0x8c/0xc0 controladores/usb/core/generic.c:238 [<00000000d40d3 6f6>] dispositivo_probe_usb+0x5c/ 0x140 controladores/usb/core/driver.c:293 [<00000000bc632c92>] very_probe+0x159/0x4a0 controladores/base/dd.c:554

*Credits: N/A

CVSS Scores

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-03-25 CVE Reserved
2024-03-25 CVE Published
2024-03-26 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (9)

URL	Tag	Source
https://git.kernel.org/stable/c/11f54f228643d0248ec00ce8c9fb8d872f87e7b8	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/448a1cb12977f52142e6feb12022c59662d88dc1	2021-06-03
https://git.kernel.org/stable/c/4a621621c7af3cec21c47c349b30cd9c3cea11c8	2021-06-03
https://git.kernel.org/stable/c/2c2fb2df46ea866b49fea5ec7112ec3cd4896c74	2021-06-03
https://git.kernel.org/stable/c/0365701bc44e078682ee1224866a71897495c7ef	2021-06-03
https://git.kernel.org/stable/c/af2a4426baf71163c0c354580ae98c7888a9aba7	2021-05-28
https://git.kernel.org/stable/c/b34cb7ac32cc8e5471dc773180ea9ae676b1a745	2021-05-28
https://git.kernel.org/stable/c/65234f50a90b64b335cbb9164b8a98c2a0d031dd	2021-05-28
https://git.kernel.org/stable/c/e0652f8bb44d6294eeeac06d703185357f25d50b	2021-05-17

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.0 < 4.4.271 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.0 < 4.4.271"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.0 < 4.9.271 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.0 < 4.9.271"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.0 < 4.14.235 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.0 < 4.14.235"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.0 < 4.19.193 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.0 < 4.19.193"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.0 < 5.4.123 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.0 < 5.4.123"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.0 < 5.10.41 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.0 < 5.10.41"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.0 < 5.12.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.0 < 5.12.8"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.0 < 5.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.0 < 5.13"		en		Affected