CVE-2021-3564

MEDIUM

Linux kernel <3.13 - Memory Corruption

Title source: llm

Description

A flaw double-free memory corruption in the Linux kernel HCI device initialization subsystem was found in the way user attach malicious HCI TTY Bluetooth device. A local user could use this flaw to crash the system. This flaw affects all the Linux kernel versions starting from 3.13.

References (6)

[Exploit, Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2021/05/25/1

[Exploit, Mailing List] http://www.openwall.com/lists/oss-security/2021/06/01/2

[Issue Tracking, Third Party Advisory] https://bugzilla.redhat.com/show_bug.cgi?id=1964139

[Third Party Advisory] https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html

[Third Party Advisory] https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html

[Exploit, Mailing List, Third Party Advisory] https://www.openwall.com/lists/oss-security/2021/05/25/1

Scores

CVSS v3 5.5

EPSS 0.0003

EPSS Percentile 6.4%

Attack Vector LOCAL

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

Classification

CWE

CWE-415

Status published

Affected Products (3)

linux/linux_kernel

fedoraproject/fedora

debian/debian_linux

Timeline

Published Jun 08, 2021

Tracked Since Feb 18, 2026