CVE-2021-3573
MEDIUM 6.9EPSS 0.4%
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.
- CVSS v3.1
- 6.4 MEDIUM
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H - CVSS v2.0
- 6.9 MEDIUM
AV:L/AC:M/Au:N/C:C/I:C/A:C - EPSS
- 0.37% chance of exploitation in the next 30 days, 30th percentile
- Published
- 2021-08-13
- Updated
- 2024-08-03