CVE-2021-47612

Severity CVSS v4.0:

Pending analysis

Type:

CWE-476 NULL Pointer Dereference

Publication date:

19/06/2024

Last modified:

27/08/2024

Description

In the Linux kernel, the following vulnerability has been resolved: nfc: fix segfault in nfc_genl_dump_devices_done When kmalloc in nfc_genl_dump_devices() fails then nfc_genl_dump_devices_done() segfaults as below KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 25 Comm: kworker/0:1 Not tainted 5.16.0-rc4-01180-g2a987e65025e-dirty #5 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-6.fc35 04/01/2014 Workqueue: events netlink_sock_destruct_work RIP: 0010:klist_iter_exit+0x26/0x80 Call Trace: class_dev_iter_exit+0x15/0x20 nfc_genl_dump_devices_done+0x3b/0x50 genl_lock_done+0x84/0xd0 netlink_sock_destruct+0x8f/0x270 __sk_destruct+0x64/0x3b0 sk_destruct+0xa8/0xd0 __sk_free+0x2e8/0x3d0 sk_free+0x51/0x90 netlink_sock_destruct_work+0x1c/0x20 process_one_work+0x411/0x710 worker_thread+0x6fd/0xa80

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::		4.4.296 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.5 (including)	4.9.294 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.10 (including)	4.14.259 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.15 (including)	4.19.222 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.20 (including)	5.4.167 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.87 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.10 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2021-47612

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools