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CVE-2021-3573

Description

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 Software


CPE Name Name Version
linux:linux_kernel linux linux kernel 5.13
redhat:enterprise_linux redhat enterprise linux 7.0
redhat:enterprise_linux redhat enterprise linux 6.0
redhat:enterprise_linux redhat enterprise linux 8.0
fedoraproject:fedora fedoraproject fedora 34

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