Vulnerability Details : CVE-2021-3564
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.
Vulnerability category: Memory Corruption
Products affected by CVE-2021-3564
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-3564
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 19 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-3564
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
2.1
|
LOW | AV:L/AC:L/Au:N/C:N/I:N/A:P |
3.9
|
2.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2021-3564
-
The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations.Assigned by:
- nvd@nist.gov (Secondary)
- secalert@redhat.com (Primary)
References for CVE-2021-3564
-
http://www.openwall.com/lists/oss-security/2021/06/01/2
oss-security - Re: CVE-2021-3564 Linux Bluetooth device initialization implementation bugExploit;Mailing List
-
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html
[SECURITY] [DLA 2690-1] linux-4.19 security updateThird Party Advisory
-
http://www.openwall.com/lists/oss-security/2021/05/25/1
oss-security - CVE-2021-3564 Linux Bluetooth device initialization implementation bugExploit;Mailing List;Third Party Advisory
-
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
[SECURITY] [DLA 2689-1] linux security updateThird Party Advisory
-
https://www.openwall.com/lists/oss-security/2021/05/25/1
oss-security - CVE-2021-3564 Linux Bluetooth device initialization implementation bugExploit;Mailing List;Third Party Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=1964139
1964139 – (CVE-2021-3564) CVE-2021-3564 kernel: double free in bluetooth subsystem when the HCI device initialization failsIssue Tracking;Third Party Advisory
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