Vulnerability Monitor

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CVE-2021-3573

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.

Published

2021-08-13T14:15:07.617

Last Modified

2024-11-21T06:21:52.687

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.4 (MEDIUM)

CVSSv2 Vector

AV:L/AC:M/Au:N/C:C/I:C/A:C

  • Access Vector: LOCAL
  • Access Complexity: MEDIUM
  • Authentication: NONE
  • Confidentiality Impact: COMPLETE
  • Integrity Impact: COMPLETE
  • Availability Impact: COMPLETE
Exploitability Score

3.4

Impact Score

10.0

Weaknesses
  • Type: Primary
    CWE-362
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System linux linux_kernel < 5.13 Yes
Operating System linux linux_kernel 5.13 Yes
Operating System linux linux_kernel 5.13 Yes
Operating System linux linux_kernel 5.13 Yes
Operating System linux linux_kernel 5.13 Yes
Operating System redhat enterprise_linux 6.0 Yes
Operating System redhat enterprise_linux 7.0 Yes
Operating System redhat enterprise_linux 8.0 Yes
Operating System fedoraproject fedora 34 Yes
References