BDU:2021-03902

Уязвимость функции sco_sock_sendmsg() подсистемы HCI ядра операционной системы Linux, позволяющая нарушителю вызвать аварийное завершение системы или повысить свои привилегии

Severity: HIGH (7.0) Vector: AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References:

CVE-2021-3640

Published: 2022-03-04
Modified: 2024-11-21

CVE-2021-3640

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.

Severity: HIGH (7.0) Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References:

Version: 2.1.0

Branch p9 update on 2021-11-23

ALT-BU-2021-4367-1

ALT-PU-2021-3333-1

Closed vulnerabilities

BDU:2021-03902

CVE-2021-3640