CVE-2021-3564

Public Exploit

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.02%
Third-Party Advisory openwall.com Third-Party Advisory redhat.com Third-Party Advisory debian.org Third-Party Advisory debian.org Third-Party Advisory openwall.com
Affected: n/a kernel
Published at:
Updated at:

References

Link Tags
http://www.openwall.com/lists/oss-security/2021/05/25/1 mailing list third party advisory exploit
http://www.openwall.com/lists/oss-security/2021/06/01/2 exploit mailing list
https://bugzilla.redhat.com/show_bug.cgi?id=1964139 third party advisory issue tracking
https://www.openwall.com/lists/oss-security/2021/05/25/1 mailing list third party advisory exploit
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2021-3564?
CVE-2021-3564 has been scored as a medium severity vulnerability.
How to fix CVE-2021-3564?
To fix CVE-2021-3564, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-3564 being actively exploited in the wild?
It is possible that CVE-2021-3564 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3564?
CVE-2021-3564 affects n/a kernel.
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