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Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 6.2%
CVSS Severity
CVSS v3 Score 6.4
CVSS v2 Score 6.9
Products affected by CVE-2021-3573


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