CVE-2021-3573 - CVE House

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Status published Medium CVE-2021-3573

A use-after-free in function hci_sock_bound_ioctl() of the Linux kernel HCI...

6.4 CVSS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from n/a

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Affected Vendor

n/a

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Affected Software

kernel

Vulnerable Versions:

kernel 5.13-rc5

Timeline

Official Publish: August 13th, 2021

Last Modified: August 3rd, 2024

Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1068 Exploitation for Privilege Escalation

Privilege Escalation

T1574 Hijack Execution Flow

T1565 Data Manipulation

T1499 Endpoint Denial of Service

T1190 Exploit Public-Facing Application