CVE-2021-3564: debian debian_linux Double Free

Modified

AliasesUBUNTU-CVE-2021-3564DEBIAN-CVE-2021-3564CGA-23h6-prjx-cxgw+170 more

Published 08-06-2021Last modified 03-08-2024

Vulnerability summary

CVE-2021-3564 is a medium (CVSS 5.5) Double Free vulnerability in debian debian_linux. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 41.8% of scored vulnerabilities. 3 public exploits are recorded.

Priority

Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

5.5/10

010

Medium · v3.1 (NVD)

EPSS score

0.48%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits3reference

Timeline

08-06-2021
PublishedVulnerability first disclosed.
03-08-2024
Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 4 sources · 2 versions

v3.15.5v2.02.1

EPSS trend

Probability

0.48%

Chance of exploitation in the next 30 days

Percentile

42%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.48% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

3 found

referenceUnverified
Exploit Reference (openwall.com)
Maturity: unknown
referenceUnverified
Exploit Reference (openwall.com)
Maturity: unknown
referenceUnverified
Exploit Reference (openwall.com)
Maturity: unknown

Weaknesses

CWE · root cause

CWE-415Double FreeThe product calls free() twice on the same memory address.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard83 products

hyperv-daemons-6.18All versions (No fix recorded)
hyperv-daemons-genericAll versions (No fix recorded)
linux-aws-6.12< 6.12.65-r0 | All versions (No fix recorded)
linux-aws-6.12-boot-installedAll versions (No fix recorded)
linux-aws-6.12-fips-boot-installedAll versions (No fix recorded)

linux-aws-6.12-headersAll versions (No fix recorded)
linux-aws-6.12-modulesAll versions (No fix recorded)
linux-aws-6.18< 6.18.10-r0 | All versions (No fix recorded)
linux-aws-6.18-boot-installedAll versions (No fix recorded)
linux-aws-6.18-fips-boot-installedAll versions (No fix recorded)
linux-aws-6.18-headersAll versions (No fix recorded)
linux-aws-6.18-modulesAll versions (No fix recorded)
linux-aws-generic< 6.18.5-r0 | All versions (No fix recorded)
linux-aws-generic-boot-installedAll versions (No fix recorded)
linux-aws-generic-fips-boot-installedAll versions (No fix recorded)
linux-aws-generic-headersAll versions (No fix recorded)
linux-aws-generic-modulesAll versions (No fix recorded)
linux-azure-6.12< 6.12.65-r1 | All versions (No fix recorded)
linux-azure-6.18All versions (No fix recorded)
linux-azure-6.18-boot-installedAll versions (No fix recorded)
linux-azure-6.18-fips-boot-installedAll versions (No fix recorded)
linux-azure-6.18-headersAll versions (No fix recorded)
linux-azure-6.18-modulesAll versions (No fix recorded)
linux-azure-generic< 6.18.5-r0 | All versions (No fix recorded)
linux-azure-generic-boot-installedAll versions (No fix recorded)
linux-azure-generic-fips-boot-installedAll versions (No fix recorded)
linux-azure-generic-headersAll versions (No fix recorded)
linux-azure-generic-modulesAll versions (No fix recorded)
linux-desktop-6.18All versions (No fix recorded)
linux-desktop-6.18-bootcAll versions (No fix recorded)
linux-desktop-6.18-bootc-boot-installedAll versions (No fix recorded)
linux-desktop-6.18-headersAll versions (No fix recorded)
linux-desktop-6.18-modulesAll versions (No fix recorded)
linux-desktop-7.2All versions (No fix recorded)
linux-desktop-7.2-bootcAll versions (No fix recorded)
linux-desktop-7.2-bootc-boot-installedAll versions (No fix recorded)
linux-desktop-7.2-headersAll versions (No fix recorded)
linux-desktop-7.2-modulesAll versions (No fix recorded)
linux-firecracker-6.18All versions (No fix recorded)
linux-gcp-6.12< 6.12.65-r0 | All versions (No fix recorded)
linux-gcp-6.18< 6.18.10-r0 | All versions (No fix recorded)
linux-gcp-6.18-boot-installedAll versions (No fix recorded)
linux-gcp-6.18-fips-boot-installedAll versions (No fix recorded)
linux-gcp-6.18-headersAll versions (No fix recorded)
linux-gcp-6.18-modulesAll versions (No fix recorded)
linux-gcp-generic< 6.18.5-r0 | All versions (No fix recorded)
linux-gcp-generic-boot-installedAll versions (No fix recorded)
linux-gcp-generic-fips-boot-installedAll versions (No fix recorded)
linux-gcp-generic-headersAll versions (No fix recorded)
linux-gcp-generic-modulesAll versions (No fix recorded)
linux-microvm-6.18All versions (No fix recorded)
linux-microvm-6.18-image-compressedAll versions (No fix recorded)
linux-microvm-6.18-image-uncompressedAll versions (No fix recorded)
linux-microvm-6.18-loadpin-testAll versions (No fix recorded)
linux-microvm-6.18-modulesAll versions (No fix recorded)
linux-microvm-7.3All versions (No fix recorded)
linux-microvm-7.3-image-compressedAll versions (No fix recorded)
linux-microvm-7.3-image-uncompressedAll versions (No fix recorded)
linux-microvm-7.3-modulesAll versions (No fix recorded)
linux-qemu-6.12< 6.12.71-r0 | All versions (No fix recorded)
linux-qemu-6.18< 6.18.10-r0
linux-qemu-generic< 6.18.5-r0 | All versions (No fix recorded)
linux-qemu-generic-bootc-boot-installed< 6.18.5-r0
linux-qemu-melange< 6.18.16-r0
linux-qemu-rc< 6.19_rc5-r0 | < 6.18_rc7-r2 | < 6.19_rc1-r2 | < 6.19_rc2-r0 | < 6.18_rc7-r3 | < 6.19_rc3-r0 | < 6.19_rc1-r0 | < 6.18_rc6-r0 | All versions (No fix recorded) | < 6.19_rc4-r0 | < 6.19_rc1-r1 | < 6.18_rc5-r0 | < 6.18_rc5-r1
linux-qemu-rc-boot-installedAll versions (No fix recorded)
linux-qemu-rc-fips-boot-installedAll versions (No fix recorded)
linux-qemu-rc-headersAll versions (No fix recorded)
linux-qemu-rc-modulesAll versions (No fix recorded)
linux-raspberry-piAll versions (No fix recorded)
linux-raspberry-pi-4All versions (No fix recorded)
linux-raspberry-pi-4-boot-configurationAll versions (No fix recorded)
linux-raspberry-pi-4-bootcAll versions (No fix recorded)
linux-raspberry-pi-boot-configurationAll versions (No fix recorded)
linux-raspberry-pi-bootcAll versions (No fix recorded)
linux-server-7.2All versions (No fix recorded)
linux-server-7.2-bootcAll versions (No fix recorded)
linux-server-7.2-bootc-boot-installedAll versions (No fix recorded)
linux-server-7.2-headersAll versions (No fix recorded)
linux-server-7.2-modulesAll versions (No fix recorded)
linux-vmware-6.12< 6.12.71-r0
linux-vmware-6.18< 6.18.10-r0
linux-vmware-genericAll versions (No fix recorded) | < 6.18.5-r0

Show all 83

Ubuntu60 products

linuxAll versions (No fix recorded) | < 4.4.0-219.252 | < 4.15.0-154.161 | < 5.4.0-81.91
linux-aws< 4.4.0-1099.104 | < 4.4.0-1135.149 | < 4.15.0-1110.117 | < 5.4.0-1055.58
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11< 5.11.0-1016.17~20.04.1
linux-aws-5.3All versions (No fix recorded)

linux-aws-5.4< 5.4.0-1055.58~18.04.1
linux-aws-5.8< 5.8.0-1042.44~20.04.1
linux-aws-fips< 4.15.0-2052.54 | All versions (No fix recorded) | < 5.4.0-1069.73+fips2
linux-aws-hwe< 4.15.0-1110.117~16.04.1
linux-azure< 4.15.0-1122.135~14.04.1 | < 4.15.0-1122.135~16.04.1 | All versions (No fix recorded) | < 5.4.0-1056.58
linux-azure-4.15< 4.15.0-1122.135
linux-azure-5.11< 5.11.0-1013.14~20.04.1
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1056.58~18.04.1
linux-azure-5.8< 5.8.0-1040.43~20.04.1
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fde-5.15< 5.15.0-1114.123~20.04.1
linux-azure-fips< 4.15.0-2034.38 | All versions (No fix recorded) | < 5.4.0-1073.76+fips1
linux-bluefield< 5.4.0-1019.22
linux-dell300x< 4.15.0-1027.32
linux-fips< 4.4.0-1069.75 | All versions (No fix recorded) | < 4.15.0-1068.77 | < 5.4.0-1032.37
linux-gcp< 4.15.0-1107.121~16.04.1 | All versions (No fix recorded) | < 5.4.0-1051.55
linux-gcp-4.15< 4.15.0-1107.121
linux-gcp-5.11< 5.11.0-1017.19~20.04.1
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1051.55~18.04.1
linux-gcp-5.8< 5.8.0-1039.41
linux-gcp-edgeAll versions (No fix recorded)
linux-gcp-fips< 4.15.0-2017.19 | All versions (No fix recorded) | < 5.4.0-1067.71~20.04.1
linux-gke< 5.4.0-1051.54
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.4< 5.4.0-1051.54~18.04.1
linux-gkeop< 5.4.0-1022.23
linux-gkeop-5.4< 5.4.0-1022.23~18.04.1
linux-hwe< 4.15.0-154.161~16.04.1 | All versions (No fix recorded)
linux-hwe-5.11< 5.11.0-34.36~20.04.1
linux-hwe-5.4< 5.4.0-81.91~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-intel-iot-realtimeAll versions (No fix recorded)
linux-kvm< 4.4.0-1100.109 | < 4.15.0-1098.100 | < 5.4.0-1045.47
linux-lts-xenial< 4.4.0-219.252~14.04.1
linux-oemAll versions (No fix recorded)
linux-oem-5.10< 5.10.0-1038.40
linux-oem-5.6All versions (No fix recorded)
linux-oracle< 4.15.0-1079.87~16.04.1 | < 4.15.0-1079.87 | < 5.4.0-1053.57
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11< 5.11.0-1016.17~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1053.57~18.04.1
linux-oracle-5.8< 5.8.0-1038.39~20.04.1
linux-raspi< 5.4.0-1042.46
linux-raspi-5.4< 5.4.0-1042.46~18.04.3
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2< 4.15.0-1094.100 | All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded)
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11< 5.11.0-1017.18~20.04.1
linux-riscv-5.8All versions (No fix recorded)
linux-snapdragon< 4.15.0-1111.120