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.
Advisories
Source ID Title
Debian DLA Debian DLA DLA-2940-1 linux security update
Debian DLA Debian DLA DLA-2941-1 linux-4.19 security update
Debian DSA Debian DSA DSA-5096-1 linux security update
EUVD EUVD EUVD-2021-26940 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.
Ubuntu USN Ubuntu USN USN-5265-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5267-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5267-3 Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN Ubuntu USN USN-5268-1 Linux kernel vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2024-08-03T17:01:07.744Z

Reserved: 2021-07-09T00:00:00

Link: CVE-2021-3640

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2022-03-03T23:15:08.197

Modified: 2024-11-21T06:22:03.073

Link: CVE-2021-3640

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-07-18T00:00:00Z

Links: CVE-2021-3640 - Bugzilla

cve-icon OpenCVE Enrichment

No data.