CVE-2021-3564

5.5 MEDIUM

A flaw double-free memory corruption in the Linux kernel HCI device initialization subsystem was found in the way user attach malicious H...

Published: 2021-06-08 · Last updated: 2026-06-17

Severity and scoring

CVSS: 5.5 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE: CWE-415

Affected products

Vendor	Product
debian	debian_linux, fedora, linux_kernel
fedoraproject	debian_linux, fedora, linux_kernel
linux	debian_linux, fedora, linux_kernel

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2021-3564
[Exploit reference]http://www.openwall.com/lists/oss-security/2021/05/25/1
[Exploit reference]http://www.openwall.com/lists/oss-security/2021/06/01/2
[Other]https://bugzilla.redhat.com/show_bug.cgi?id=1964139
[Other]https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html
[Other]https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
[Exploit reference]https://www.openwall.com/lists/oss-security/2021/05/25/1
[Exploit reference]http://www.openwall.com/lists/oss-security/2021/05/25/1
[Exploit reference]http://www.openwall.com/lists/oss-security/2021/06/01/2
[Other]https://bugzilla.redhat.com/show_bug.cgi?id=1964139
[Other]https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html
[Other]https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
[Exploit reference]https://www.openwall.com/lists/oss-security/2021/05/25/1

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