UBUNTU-CVE-2021-3573

Advisory lineage Upstream: 1 Downstream: 6
Upstream
CVE-2021-3573
Published: 06 Jun 2021, 13:00
Last modified:03 Jun 2026, 13:34

Vulnerability Summary

Overall Risk (default)
medium
26/100
CVSS Score
6.4 MEDIUM
3.1 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

06 Jun 2021, 13:00
Published
Vulnerability first disclosed
03 Jun 2026, 13:34
Last Modified
Vulnerability information updated

Description

A use-after-free in function hci_sock_bound_ioctl() of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hci_unregister_dev() together with one of the calls hci_sock_blacklist_add(), hci_sock_blacklist_del(), hci_get_conn_info(), hci_get_auth_info(). A privileged local user could use this flaw to crash the system or escalate their privileges on the system. This flaw affects the Linux kernel versions prior to 5.13-rc5.

CVSS Metrics

  • v3.1•MEDIUM•Score: 6.4CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected Systems

  • ubuntu•linux

    all | < 4.4.0-222.255 | < 4.15.0-154.161 | < 5.4.0-81.91

  • ubuntu•linux-aws

    < 4.4.0-1102.107 | < 4.4.0-1138.152 | < 4.15.0-1110.117 | < 5.4.0-1055.58

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.11

    < 5.11.0-1016.17~20.04.1

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1055.58~18.04.1

  • ubuntu•linux-aws-5.8

    < 5.8.0-1042.44~20.04.1

  • ubuntu•linux-aws-fips

    < 4.15.0-2052.54 | all | < 5.4.0-1069.73+fips2

  • ubuntu•linux-aws-hwe

    < 4.15.0-1110.117~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1122.135~14.04.1 | < 4.15.0-1122.135~16.04.1 | all | < 5.4.0-1056.58

  • ubuntu•linux-azure-4.15

    < 4.15.0-1122.135

  • ubuntu•linux-azure-5.11

    < 5.11.0-1013.14~20.04.1

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1056.58~18.04.1

  • ubuntu•linux-azure-5.8

    < 5.8.0-1040.43~20.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fde-5.15

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2034.38 | all | < 5.4.0-1073.76+fips1

  • ubuntu•linux-bluefield

    < 5.4.0-1019.22 | all

  • ubuntu•linux-dell300x

    < 4.15.0-1027.32

  • ubuntu•linux-fips

    < 4.4.0-1072.78 | all | < 4.15.0-1068.77 | < 5.4.0-1032.37

  • ubuntu•linux-gcp

    < 4.15.0-1107.121~16.04.1 | all | < 5.4.0-1051.55

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1107.121

  • ubuntu•linux-gcp-5.11

    < 5.11.0-1017.19~20.04.1

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1051.55~18.04.1

  • ubuntu•linux-gcp-5.8

    < 5.8.0-1039.41

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-gcp-fips

    < 4.15.0-2017.19 | all | < 5.4.0-1067.71~20.04.1

  • ubuntu•linux-gke

    < 5.4.0-1051.54

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-gke-5.4

    < 5.4.0-1051.54~18.04.1

  • ubuntu•linux-gkeop

    < 5.4.0-1022.23

  • ubuntu•linux-gkeop-5.4

    < 5.4.0-1022.23~18.04.1

  • ubuntu•linux-hwe

    < 4.15.0-154.161~16.04.1 | all

  • ubuntu•linux-hwe-5.11

    < 5.11.0-34.36~20.04.1

  • ubuntu•linux-hwe-5.4

    < 5.4.0-81.91~18.04.1

  • ubuntu•linux-hwe-5.8

    all

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.4.0-1103.112 | < 4.15.0-1098.100 | < 5.4.0-1045.47

  • ubuntu•linux-lts-xenial

    < 4.4.0-222.255~14.04.1

  • ubuntu•linux-nvidia

    all

  • ubuntu•linux-oem

    all

  • ubuntu•linux-oem-5.10

    < 5.10.0-1038.40

  • ubuntu•linux-oem-5.6

    all

  • ubuntu•linux-oracle

    < 4.15.0-1079.87~16.04.1 | < 4.15.0-1079.87 | < 5.4.0-1053.57

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.11

    < 5.11.0-1016.17~20.04.1

  • ubuntu•linux-oracle-5.3

    all

Showing first 50 affected entries in server-rendered view.

References (9)