CVE-2021-3752

kernel: possible use-after-free in bluetooth module

Severity Score

7.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A use-after-free flaw was found in the Linux kernel’s Bluetooth subsystem in the way user calls connect to the socket and disconnect simultaneously due to a race condition. This flaw allows a user to crash the system or escalate their privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Se ha encontrado un fallo de uso de memoria previamente liberada en el subsistema Bluetooth del kernel de Linux en la forma en que las llamadas de usuario son conectadas al socket y son desconectadas simultáneamente debido a una condición de carrera. Este fallo permite a un usuario bloquear el sistema o escalar sus privilegios. La mayor amenaza de esta vulnerabilidad es para la confidencialidad, la integridad y la disponibilidad del sistema

*Credits: N/A

CVSS Scores

Attack Vector

Adjacent

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Adjacent

Attack Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-08-31 CVE Reserved
2022-02-03 CVE Published
2023-11-08 EPSS Updated
2024-08-03 CVE Updated
2024-08-03 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-416: Use After Free

CAPEC

References (9)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html	Mailing List
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html	Mailing List
https://lore.kernel.org/lkml/20211115165435.133245729%40linuxfoundation.org	X_refsource_misc
https://security.netapp.com/advisory/ntap-20220318-0009	Third Party Advisory

URL	Date	SRC
https://www.openwall.com/lists/oss-security/2021/09/15/4	2024-08-03

URL	Date	SRC
https://www.oracle.com/security-alerts/cpujul2022.html	2023-11-09

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=1999544	2022-05-10
https://www.debian.org/security/2022/dsa-5096	2023-11-09
https://access.redhat.com/security/cve/CVE-2021-3752	2022-05-10

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Netapp Search vendor "Netapp"	H300s Firmware Search vendor "Netapp" for product "H300s Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H300s Search vendor "Netapp" for product "H300s"	-	-	Safe
Netapp Search vendor "Netapp"	H500s Firmware Search vendor "Netapp" for product "H500s Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H500s Search vendor "Netapp" for product "H500s"	-	-	Safe
Netapp Search vendor "Netapp"	H700s Firmware Search vendor "Netapp" for product "H700s Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H700s Search vendor "Netapp" for product "H700s"	-	-	Safe
Netapp Search vendor "Netapp"	H300e Firmware Search vendor "Netapp" for product "H300e Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H300e Search vendor "Netapp" for product "H300e"	-	-	Safe
Netapp Search vendor "Netapp"	H500e Firmware Search vendor "Netapp" for product "H500e Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H500e Search vendor "Netapp" for product "H500e"	-	-	Safe
Netapp Search vendor "Netapp"	H700e Firmware Search vendor "Netapp" for product "H700e Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H700e Search vendor "Netapp" for product "H700e"	-	-	Safe
Netapp Search vendor "Netapp"	H410s Firmware Search vendor "Netapp" for product "H410s Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H410s Search vendor "Netapp" for product "H410s"	-	-	Safe
Netapp Search vendor "Netapp"	H410c Firmware Search vendor "Netapp" for product "H410c Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H410c Search vendor "Netapp" for product "H410c"	-	-	Safe
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.12 < 4.4.293 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.12 < 4.4.293"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.5 < 4.9.291 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 4.9.291"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.10 < 4.14.256 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.10 < 4.14.256"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.15 < 4.19.218 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 4.19.218"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.20 < 5.4.160 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.20 < 5.4.160"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.5 < 5.10.80 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.10.80"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.11 < 5.14.19 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.11 < 5.14.19"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.15 < 5.15.3 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15 < 5.15.3"		-		Affected
Redhat Search vendor "Redhat"		3scale Search vendor "Redhat" for product "3scale"				2.0 Search vendor "Redhat" for product "3scale" and version "2.0"		-		Affected
Redhat Search vendor "Redhat"		Virtualization Host Search vendor "Redhat" for product "Virtualization Host"				4.0 Search vendor "Redhat" for product "Virtualization Host" and version "4.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux For Real Time Search vendor "Redhat" for product "Enterprise Linux For Real Time"				7 Search vendor "Redhat" for product "Enterprise Linux For Real Time" and version "7"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux For Real Time For Nfv Search vendor "Redhat" for product "Enterprise Linux For Real Time For Nfv"				7 Search vendor "Redhat" for product "Enterprise Linux For Real Time For Nfv" and version "7"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Oracle Search vendor "Oracle"		Communications Cloud Native Core Binding Support Function Search vendor "Oracle" for product "Communications Cloud Native Core Binding Support Function"				22.1.3 Search vendor "Oracle" for product "Communications Cloud Native Core Binding Support Function" and version "22.1.3"		-		Affected
Oracle Search vendor "Oracle"		Communications Cloud Native Core Network Exposure Function Search vendor "Oracle" for product "Communications Cloud Native Core Network Exposure Function"				22.1.1 Search vendor "Oracle" for product "Communications Cloud Native Core Network Exposure Function" and version "22.1.1"		-		Affected
Oracle Search vendor "Oracle"		Communications Cloud Native Core Policy Search vendor "Oracle" for product "Communications Cloud Native Core Policy"				22.2.0 Search vendor "Oracle" for product "Communications Cloud Native Core Policy" and version "22.2.0"		-		Affected