Linux Kernel Bluetooth l2cap_core.c's l2cap_le_connect_req use after free

CVSS Meta Temp Score
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CTI Interest Score
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7.6$5k-$25k0.32

A vulnerability was found in Linux Kernel (Operating System) (affected version unknown). It has been declared as critical. Affected by this vulnerability is the function l2cap_le_connect_req of the file net/bluetooth/l2cap_core.c's of the component Bluetooth Handler. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

There are use-after-free vulnerabilities in the Linux kernel's net/bluetooth/l2cap_core.c's l2cap_connect and l2cap_le_connect_req functions which may allow code execution and leaking kernel memory (respectively) remotely via Bluetooth. A remote attacker could execute code leaking kernel memory via Bluetooth if within proximity of the victim. We recommend upgrading past commit https://www.google.com/url https://github.com/torvalds/linux/commit/711f8c3fb3db61897080468586b970c87c61d9e4 https://www.google.com/url

The weakness was released 11/23/2022 as 711f8c3fb3db61897080468586b970c87c61d9e4. The advisory is shared at github.com. This vulnerability is known as CVE-2022-42896 since 10/12/2022. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/23/2022).

Applying the patch 711f8c3fb3db61897080468586b970c87c61d9e4 is able to eliminate this problem. The bugfix is ready for download at github.com.

Productinfo

Type

Vendor

Name

License

  • open-source

CPE 2.3info

CPE 2.2info

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.0
CNA Vector (Google Inc.): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
ATT&CK: Unknown

Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 711f8c3fb3db61897080468586b970c87c61d9e4

Timelineinfo

10/12/2022 CVE reserved
11/23/2022 +42 days Advisory disclosed
11/23/2022 +0 days VulDB entry created
11/23/2022 +0 days VulDB last update

Sourcesinfo

Vendor: kernel.org

Advisory: 711f8c3fb3db61897080468586b970c87c61d9e4
Status: Confirmed

CVE: CVE-2022-42896 (🔒)

Entryinfo

Created: 11/23/2022 08:29 PM
Changes: 11/23/2022 08:29 PM (53)
Complete: 🔍

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