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Test your applicationsUpgrade RHEL:7
kernel-debug
to version 0:3.10.0-1160.59.1.el7 or higher.
This issue was patched in RHSA-2022:0620
.
Note: Versions mentioned in the description apply only to the upstream kernel-debug
package and not the kernel-debug
package as distributed by RHEL
.
See How to fix?
for RHEL:7
relevant fixed versions and status.
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.