CVE-2021-3640

CVE Details

Release Date:

2022-03-03

Description

A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del() together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A privileged local user could use this flaw to crash the system or escalate their privileges on the system.

See more information about CVE-2021-3640 from MITRE CVE dictionary and NIST NVD

CVSS v3.0 metrics

NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score:	7	Base Metrics:	AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Access Vector:	Local network	Attack Complexity:	High
Privileges Required:	Low	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	High
Integrity Impact:	High	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (kernel-uek)	ELSA-2022-9147	2022-02-14
Oracle Linux version 7 (kernel-uek-container)	ELSA-2022-9148	2022-02-14
Oracle Linux version 8 (kernel)	ELSA-2022-7683	2022-11-15
Oracle Linux version 8 (kernel-uek)	ELSA-2022-9147	2022-02-14
Oracle Linux version 8 (kernel-uek-container)	ELSA-2022-9148	2022-02-14
Oracle Linux version 9 (kernel)	ELSA-2022-8267	2022-11-22

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team