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ubuntucveUbuntu.comUB:CVE-2021-3573
HistoryJun 06, 2021 - 12:00 a.m.

CVE-2021-3573

2021-06-0600:00:00
ubuntu.com
ubuntu.com
34

6.4 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

6.9 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:C/I:C/A:C

0.0004 Low

EPSS

Percentile

5.3%

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.

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchlinux-gkeop< 5.4.0-1022.23UNKNOWN
ubuntu22.04noarchlinux-gkeop< anyUNKNOWN
ubuntu20.04noarchlinux-aws-5.8< 5.8.0-1042.44~20.04.1UNKNOWN
ubuntu18.04noarchlinux< 4.15.0-154.161UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-81.91UNKNOWN
ubuntu21.04noarchlinux< 5.11.0-31.33UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-222.255) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1110.117UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1055.58UNKNOWN
ubuntu21.04noarchlinux-aws< 5.11.0-1016.17UNKNOWN
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6.4 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

6.9 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:C/I:C/A:C

0.0004 Low

EPSS

Percentile

5.3%