Is CVE-2021-3564 in the CISA KEV catalog?

No. CVE-2021-3564 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3564?

CVE-2021-3564 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2021-3564?

CVE-2021-3564 has an EPSS score of 0.48% (38th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3564?

Upgrade linux on debian 11 to 5.10.46-1 or later. Fixes are available for 117 affected products.

CVE & CISA-KEV Catalog

CVE-2021-3564

MEDIUM

5.5

CVSS v3

NVD

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.

CWE-415

How to fix

Remediation Available

linuxDebian

Fixed in:5.10.46-1CVE-2021-3564

linuxUbuntu

Fixed in:4.4.0-222.255USN-5343-1

Fixed in:4.4.0-219.252USN-5299-1

Fixed in:4.15.0-154.161USN-5044-1

Fixed in:5.4.0-81.91USN-5045-1

linux-awsUbuntu

Fixed in:4.4.0-1102.107USN-5343-1

Fixed in:4.4.0-1099.104USN-5299-1

Fixed in:4.4.0-1135.149USN-5299-1

Fixed in:4.4.0-1138.152USN-5343-1

Fixed in:4.15.0-1110.117USN-5044-1

Fixed in:5.4.0-1055.58USN-5045-1

linux-aws-5.4Ubuntu

Fixed in:5.4.0-1055.58~18.04.1USN-5045-1

linux-aws-5.8Ubuntu

Fixed in:5.8.0-1042.44~20.04.1USN-5050-1

linux-aws-hweUbuntu

Fixed in:4.15.0-1110.117~16.04.1USN-5044-1

linux-azureUbuntu

Fixed in:4.15.0-1122.135~14.04.1USN-5044-1

Fixed in:4.15.0-1122.135~16.04.1USN-5044-1

Fixed in:5.4.0-1056.58USN-5045-1

linux-azure-4.15Ubuntu

Fixed in:4.15.0-1122.135USN-5044-1

linux-azure-5.4Ubuntu

Fixed in:5.4.0-1056.58~18.04.1USN-5045-1

linux-azure-5.8Ubuntu

Fixed in:5.8.0-1040.43~20.04.1USN-5050-1

linux-gcpUbuntu

Fixed in:4.15.0-1107.121~16.04.1USN-5044-1

Fixed in:5.4.0-1051.55USN-5045-1

linux-gcp-4.15Ubuntu

Fixed in:4.15.0-1107.121USN-5044-1

linux-gcp-5.4Ubuntu

Fixed in:5.4.0-1051.55~18.04.1USN-5045-1

linux-gcp-5.8Ubuntu

Fixed in:5.8.0-1039.41USN-5050-1

linux-gkeUbuntu

Fixed in:5.4.0-1051.54USN-5045-1

linux-gke-5.4Ubuntu

Fixed in:5.4.0-1051.54~18.04.1USN-5045-1

linux-gkeopUbuntu

Fixed in:5.4.0-1022.23USN-5045-1

linux-gkeop-5.4Ubuntu

Fixed in:5.4.0-1022.23~18.04.1USN-5045-1

linux-hweUbuntu

Fixed in:4.15.0-154.161~16.04.1USN-5044-1

linux-hwe-5.11Ubuntu

Fixed in:5.11.0-27.29~20.04.1USN-5046-1

linux-hwe-5.4Ubuntu

Fixed in:5.4.0-81.91~18.04.1USN-5045-1

linux-image-4.15.0-1079-oracleUbuntu

Fixed in:4.15.0-1079.87~16.04.1USN-5044-1

Fixed in:4.15.0-1079.87USN-5044-1

linux-image-4.15.0-1094-raspi2Ubuntu

Fixed in:4.15.0-1094.100USN-5044-1

linux-image-4.15.0-1098-kvmUbuntu

Fixed in:4.15.0-1098.100USN-5044-1

linux-image-4.15.0-1107-gcpUbuntu

Fixed in:4.15.0-1107.121~16.04.1USN-5044-1

Fixed in:4.15.0-1107.121USN-5044-1

linux-image-4.15.0-1110-awsUbuntu

Fixed in:4.15.0-1110.117~16.04.1USN-5044-1

Fixed in:4.15.0-1110.117USN-5044-1

linux-image-4.15.0-1111-snapdragonUbuntu

Fixed in:4.15.0-1111.120USN-5044-1

linux-image-4.15.0-1122-azureUbuntu

Fixed in:4.15.0-1122.135~14.04.1USN-5044-1

Fixed in:4.15.0-1122.135~16.04.1USN-5044-1

Fixed in:4.15.0-1122.135USN-5044-1

linux-image-4.15.0-154-genericUbuntu

Fixed in:4.15.0-154.161~16.04.1USN-5044-1

Fixed in:4.15.0-154.161USN-5044-1

linux-image-4.15.0-154-generic-lpaeUbuntu

Fixed in:4.15.0-154.161USN-5044-1

linux-image-4.15.0-154-lowlatencyUbuntu

Fixed in:4.15.0-154.161~16.04.1USN-5044-1

Fixed in:4.15.0-154.161USN-5044-1

linux-image-4.4.0-1099-awsUbuntu

Fixed in:4.4.0-1099.104USN-5299-1

linux-image-4.4.0-1100-kvmUbuntu

Fixed in:4.4.0-1100.109USN-5299-1

linux-image-4.4.0-1102-awsUbuntu

Fixed in:4.4.0-1102.107USN-5343-1

linux-image-4.4.0-1103-kvmUbuntu

Fixed in:4.4.0-1103.112USN-5343-1

linux-image-4.4.0-1135-awsUbuntu

Fixed in:4.4.0-1135.149USN-5299-1

linux-image-4.4.0-1138-awsUbuntu

Fixed in:4.4.0-1138.152USN-5343-1

linux-image-4.4.0-219-genericUbuntu

Fixed in:4.4.0-219.252~14.04.1USN-5299-1

Fixed in:4.4.0-219.252USN-5299-1

linux-image-4.4.0-219-lowlatencyUbuntu

Fixed in:4.4.0-219.252~14.04.1USN-5299-1

Fixed in:4.4.0-219.252USN-5299-1

linux-image-4.4.0-222-genericUbuntu

Fixed in:4.4.0-222.255~14.04.1USN-5343-1

Fixed in:4.4.0-222.255USN-5343-1

linux-image-4.4.0-222-lowlatencyUbuntu

Fixed in:4.4.0-222.255~14.04.1USN-5343-1

Fixed in:4.4.0-222.255USN-5343-1

linux-image-5.10.0-1038-oemUbuntu

Fixed in:5.10.0-1038.40USN-5015-1

linux-image-5.11.0-27-genericUbuntu

Fixed in:5.11.0-27.29~20.04.1USN-5046-1

linux-image-5.11.0-27-generic-64kUbuntu

Fixed in:5.11.0-27.29~20.04.1USN-5046-1

linux-image-5.11.0-27-generic-lpaeUbuntu

Fixed in:5.11.0-27.29~20.04.1USN-5046-1

linux-image-5.11.0-27-lowlatencyUbuntu

Fixed in:5.11.0-27.29~20.04.1USN-5046-1

linux-image-5.4.0-1022-gkeopUbuntu

Fixed in:5.4.0-1022.23~18.04.1USN-5045-1

Fixed in:5.4.0-1022.23USN-5045-1

linux-image-5.4.0-1042-raspiUbuntu

Fixed in:5.4.0-1042.46~18.04.3USN-5045-1

Fixed in:5.4.0-1042.46USN-5045-1

linux-image-5.4.0-1045-kvmUbuntu

Fixed in:5.4.0-1045.47USN-5045-1

linux-image-5.4.0-1051-gcpUbuntu

Fixed in:5.4.0-1051.55~18.04.1USN-5045-1

Fixed in:5.4.0-1051.55USN-5045-1

linux-image-5.4.0-1051-gkeUbuntu

Fixed in:5.4.0-1051.54~18.04.1USN-5045-1

Fixed in:5.4.0-1051.54USN-5045-1

linux-image-5.4.0-1053-oracleUbuntu

Fixed in:5.4.0-1053.57~18.04.1USN-5045-1

Fixed in:5.4.0-1053.57USN-5045-1

linux-image-5.4.0-1055-awsUbuntu

Fixed in:5.4.0-1055.58~18.04.1USN-5045-1

Fixed in:5.4.0-1055.58USN-5045-1

linux-image-5.4.0-1056-azureUbuntu

Fixed in:5.4.0-1056.58~18.04.1USN-5045-1

Fixed in:5.4.0-1056.58USN-5045-1

linux-image-5.4.0-81-genericUbuntu

Fixed in:5.4.0-81.91~18.04.1USN-5045-1

Fixed in:5.4.0-81.91USN-5045-1

linux-image-5.4.0-81-generic-lpaeUbuntu

Fixed in:5.4.0-81.91~18.04.1USN-5045-1

Fixed in:5.4.0-81.91USN-5045-1

linux-image-5.4.0-81-lowlatencyUbuntu

Fixed in:5.4.0-81.91~18.04.1USN-5045-1

Fixed in:5.4.0-81.91USN-5045-1

linux-image-5.8.0-1038-oracleUbuntu

Fixed in:5.8.0-1038.39~20.04.1USN-5050-1

linux-image-5.8.0-1039-gcpUbuntu

Fixed in:5.8.0-1039.41USN-5050-1

linux-image-5.8.0-1040-azureUbuntu

Fixed in:5.8.0-1040.43~20.04.1USN-5050-1

linux-image-5.8.0-1042-awsUbuntu

Fixed in:5.8.0-1042.44~20.04.1USN-5050-1

linux-image-awsUbuntu

Fixed in:4.4.0.1102.100USN-5343-1

Fixed in:4.4.0.1099.97USN-5299-1

Fixed in:4.4.0.1135.140USN-5299-1

Fixed in:4.4.0.1138.143USN-5343-1

Fixed in:5.4.0.1055.38USN-5045-1

Fixed in:5.8.0.1042.44~20.04.14USN-5050-1

linux-image-aws-hweUbuntu

Fixed in:4.15.0.1110.101USN-5044-1

linux-image-aws-lts-18.04Ubuntu

Fixed in:4.15.0.1110.113USN-5044-1

linux-image-aws-lts-20.04Ubuntu

Fixed in:5.4.0.1055.58USN-5045-1

linux-image-azureUbuntu

Fixed in:4.15.0.1122.95USN-5044-1

Fixed in:4.15.0.1122.113USN-5044-1

Fixed in:5.4.0.1056.36USN-5045-1

Fixed in:5.8.0.1040.43~20.04.12USN-5050-1

linux-image-azure-lts-18.04Ubuntu

Fixed in:4.15.0.1122.95USN-5044-1

linux-image-azure-lts-20.04Ubuntu

Fixed in:5.4.0.1056.54USN-5045-1

linux-image-gcpUbuntu

Fixed in:4.15.0.1107.108USN-5044-1

Fixed in:5.4.0.1051.37USN-5045-1

Fixed in:5.8.0.1039.14USN-5050-1

linux-image-gcp-lts-18.04Ubuntu

Fixed in:4.15.0.1107.126USN-5044-1

linux-image-gcp-lts-20.04Ubuntu

Fixed in:5.4.0.1051.61USN-5045-1

linux-image-genericUbuntu

Fixed in:4.4.0.222.229USN-5343-1

Fixed in:4.4.0.219.226USN-5299-1

Fixed in:4.15.0.154.143USN-5044-1

Fixed in:5.4.0.81.85USN-5045-1

linux-image-generic-64k-hwe-20.04Ubuntu

Fixed in:5.11.0.27.29~20.04.11USN-5046-1

linux-image-generic-hwe-16.04Ubuntu

Fixed in:4.15.0.154.148USN-5044-1

linux-image-generic-hwe-18.04Ubuntu

Fixed in:5.4.0.81.91~18.04.73USN-5045-1

linux-image-generic-hwe-20.04Ubuntu

Fixed in:5.11.0.27.29~20.04.11USN-5046-1

linux-image-generic-lpaeUbuntu

Fixed in:4.15.0.154.143USN-5044-1

Fixed in:5.4.0.81.85USN-5045-1

linux-image-generic-lpae-hwe-18.04Ubuntu

Fixed in:5.4.0.81.91~18.04.73USN-5045-1

linux-image-generic-lpae-hwe-20.04Ubuntu

Fixed in:5.11.0.27.29~20.04.11USN-5046-1

linux-image-generic-lts-xenialUbuntu

Fixed in:4.4.0.222.193USN-5343-1

Fixed in:4.4.0.219.190USN-5299-1

linux-image-gkeUbuntu

Fixed in:4.15.0.1107.108USN-5044-1

Fixed in:5.4.0.1051.61USN-5045-1

linux-image-gke-5.4Ubuntu

Fixed in:5.4.0.1051.54~18.04.16USN-5045-1

Fixed in:5.4.0.1051.61USN-5045-1

linux-image-gkeopUbuntu

Fixed in:5.4.0.1022.25USN-5045-1

linux-image-gkeop-5.4Ubuntu

Fixed in:5.4.0.1022.23~18.04.23USN-5045-1

Fixed in:5.4.0.1022.25USN-5045-1

linux-image-kvmUbuntu

Fixed in:4.4.0.1100.98USN-5299-1

Fixed in:4.4.0.1103.101USN-5343-1

Fixed in:4.15.0.1098.94USN-5044-1

Fixed in:5.4.0.1045.44USN-5045-1

linux-image-lowlatencyUbuntu

Fixed in:4.4.0.219.226USN-5299-1

Fixed in:4.4.0.222.229USN-5343-1

Fixed in:4.15.0.154.143USN-5044-1

Fixed in:5.4.0.81.85USN-5045-1

linux-image-lowlatency-hwe-16.04Ubuntu

Fixed in:4.15.0.154.148USN-5044-1

linux-image-lowlatency-hwe-18.04Ubuntu

Fixed in:5.4.0.81.91~18.04.73USN-5045-1

linux-image-lowlatency-hwe-20.04Ubuntu

Fixed in:5.11.0.27.29~20.04.11USN-5046-1

linux-image-lowlatency-lts-xenialUbuntu

Fixed in:4.4.0.219.190USN-5299-1

Fixed in:4.4.0.222.193USN-5343-1

linux-image-oemUbuntu

Fixed in:4.15.0.154.148USN-5044-1

Fixed in:5.4.0.81.91~18.04.73USN-5045-1

Fixed in:5.4.0.81.85USN-5045-1

linux-image-oem-20.04Ubuntu

Fixed in:5.10.0.1038.40USN-5015-1

linux-image-oem-20.04bUbuntu

Fixed in:5.10.0.1038.40USN-5015-1

linux-image-oem-osp1Ubuntu

Fixed in:5.4.0.81.91~18.04.73USN-5045-1

Fixed in:5.4.0.81.85USN-5045-1

linux-image-oracleUbuntu

Fixed in:4.15.0.1079.67USN-5044-1

Fixed in:5.4.0.1053.57~18.04.33USN-5045-1

Fixed in:5.8.0.1038.39~20.04.14USN-5050-1

linux-image-oracle-lts-18.04Ubuntu

Fixed in:4.15.0.1079.89USN-5044-1

linux-image-oracle-lts-20.04Ubuntu

Fixed in:5.4.0.1053.53USN-5045-1

linux-image-raspiUbuntu

Fixed in:5.4.0.1042.77USN-5045-1

linux-image-raspi-hwe-18.04Ubuntu

Fixed in:5.4.0.1042.45USN-5045-1

linux-image-raspi2Ubuntu

Fixed in:4.15.0.1094.92USN-5044-1

Fixed in:5.4.0.1042.77USN-5045-1

linux-image-snapdragonUbuntu

Fixed in:4.15.0.1111.114USN-5044-1

linux-image-snapdragon-hwe-18.04Ubuntu

Fixed in:5.4.0.81.91~18.04.73USN-5045-1

linux-image-virtualUbuntu

Fixed in:4.4.0.222.229USN-5343-1

Fixed in:4.4.0.219.226USN-5299-1

Fixed in:4.15.0.154.143USN-5044-1

Fixed in:5.4.0.81.85USN-5045-1

linux-image-virtual-hwe-16.04Ubuntu

Fixed in:4.15.0.154.148USN-5044-1

linux-image-virtual-hwe-18.04Ubuntu

Fixed in:5.4.0.81.91~18.04.73USN-5045-1

linux-image-virtual-hwe-20.04Ubuntu

Fixed in:5.11.0.27.29~20.04.11USN-5046-1

linux-image-virtual-lts-xenialUbuntu

Fixed in:4.4.0.222.193USN-5343-1

Fixed in:4.4.0.219.190USN-5299-1

linux-kvmUbuntu

Fixed in:4.4.0-1103.112USN-5343-1

Fixed in:4.4.0-1100.109USN-5299-1

Fixed in:4.15.0-1098.100USN-5044-1

Fixed in:5.4.0-1045.47USN-5045-1

linux-lts-xenialUbuntu

Fixed in:4.4.0-222.255~14.04.1USN-5343-1

Fixed in:4.4.0-219.252~14.04.1USN-5299-1

linux-oem-5.10Ubuntu

Fixed in:5.10.0-1038.40USN-5015-1

linux-oracleUbuntu

Fixed in:4.15.0-1079.87~16.04.1USN-5044-1

Fixed in:4.15.0-1079.87USN-5044-1

Fixed in:5.4.0-1053.57USN-5045-1

linux-oracle-5.4Ubuntu

Fixed in:5.4.0-1053.57~18.04.1USN-5045-1

linux-oracle-5.8Ubuntu

Fixed in:5.8.0-1038.39~20.04.1USN-5050-1

linux-raspiUbuntu

Fixed in:5.4.0-1042.46USN-5045-1

linux-raspi-5.4Ubuntu

Fixed in:5.4.0-1042.46~18.04.3USN-5045-1

linux-raspi2Ubuntu

Fixed in:4.15.0-1094.100USN-5044-1

linux-snapdragonUbuntu

Fixed in:4.15.0-1111.120USN-5044-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.48%probability of exploitation in 30 days

38thpercentile

Low risk: more likely to be exploited than 38% of all known CVEs.

References

Exploit3

Third-Party Advisory3

Related Vulnerabilities

Other CWE-415 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-25136	Medium	6.5	90%	-	Fix
CVE-2018-0101	Critical	10.0	87%	-	Fix
CVE-2003-0545	Critical	9.8	85%	-	Fix
CVE-2019-3829	Medium	5.3	59%	-	Fix
CVE-2026-33824	Critical	9.8	56%	-	Fix
CVE-2021-3407	Medium	5.5	50%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.