VULNERABILITY INTELLIGENCE

CVE-2021-3640

CVSS score7 HIGH
EPSS probability0.37%
CISA KEVNot currently listed
Published2022-03-03
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • secalert@redhat.com: CWE-362
  • nvd@nist.gov: CWE-416

Primary references