CVE-2021-3573

A use-after-free in function hci_sock_bound_ioctl() of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hci_unregister_dev() together with one of the calls hci_sock_blacklist_add(), hci_sock_blacklist_del(), hci_get_conn_info(), hci_get_auth_info(). A privileged local user could use this flaw to crash the system or escalate their privileges on the system. This flaw affects the Linux kernel versions prior to 5.13-rc5.

Affected products

Alt Linux, Almalinux, Astra Linux, Centos, Linuxmint, Linux Kernel, Red Hat, Suse

Linux Linux Kernel

< 5.13

Fix

Available

CVSS 2.0

6.9 MEDIUM

CVSS 3.1

6.4 MEDIUM

EPSS

0.4% (30th percentile)

Weakness

CWE-362

NVD status

Modified

Published

2021-08-13

No exploit for CVE-2021-3573 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.