CVE-2021-47612

MEDIUM
Published Jun 19, 2024 Modified Nov 21, 2024 CWE-476

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: <TASK> 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

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CVSS v3.1 Score

5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/214af18abbe39db05beb305b2d11e87d09a6529c https://git.kernel.org/stable/c/2a8845b9603c545fddd17862282dc4c4ce0971e3 https://git.kernel.org/stable/c/6644989642844de830f9b072cd65c553cb55946c https://git.kernel.org/stable/c/c602863ad28ec86794cb4ab4edea5324f555f181 https://git.kernel.org/stable/c/d731ecc6f2eaec68f4ad1542283bbc7d07bd0112 https://git.kernel.org/stable/c/d89e4211b51752daf063d638af50abed2fd5f96d https://git.kernel.org/stable/c/ea55b3797878752aa076b118afb727dcf79cac34 https://git.kernel.org/stable/c/fd79a0cbf0b2e34bcc45b13acf962e2032a82203 https://git.kernel.org/stable/c/214af18abbe39db05beb305b2d11e87d09a6529c https://git.kernel.org/stable/c/2a8845b9603c545fddd17862282dc4c4ce0971e3 https://git.kernel.org/stable/c/6644989642844de830f9b072cd65c553cb55946c https://git.kernel.org/stable/c/c602863ad28ec86794cb4ab4edea5324f555f181 https://git.kernel.org/stable/c/d731ecc6f2eaec68f4ad1542283bbc7d07bd0112 https://git.kernel.org/stable/c/d89e4211b51752daf063d638af50abed2fd5f96d https://git.kernel.org/stable/c/ea55b3797878752aa076b118afb727dcf79cac34 https://git.kernel.org/stable/c/fd79a0cbf0b2e34bcc45b13acf962e2032a82203

Frequently Asked Questions

What is CVE-2021-47612? +
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: <TASK> 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 It has a CVSS v3.1 base score of 5.5 (MEDIUM).
How severe is CVE-2021-47612? +
CVE-2021-47612 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2021-47612? +
CVE-2021-47612 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2021-47612? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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