CVE-2021-3573

 

Published at: - 13-08-2021 04:15

Last modified: - 26-10-2022 01:44

Total changes: - 4

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

 

Verification logic

 

Reference

• https://bugzilla.redhat.com/show_bug.cgi?id=1966578
• https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth.git/commit/?id=e305509e678b3a4af2b3cfd410f409f7cdaabb52
• https://www.openwall.com/lists/oss-security/2021/06/08/2

 

Keywords

NVD

 

CVE-2021-3573

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures