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prionPRIOn knowledge basePRION:CVE-2021-3573
HistoryAug 13, 2021 - 2:15 p.m.

Race condition

2021-08-1314:15:00
PRIOn knowledge base
www.prio-n.com
12

6.3 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

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.