VDB-210796 · CVE-2022-42720 · DLA 3173-1

Linux Kernel up to 5.19.14 mac80211 Stack use after free

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.9	$0-$5k	0.00

A vulnerability was found in Linux Kernel up to 5.19.14 (Operating System). It has been declared as critical. This vulnerability affects an unknown code block of the component mac80211 Stack. 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. CVE summarizes:

Various refcounting bugs in the multi-BSS handling in the mac80211 stack in the Linux kernel 5.1 through 5.19.14 could be used by local attackers (able to inject WLAN frames) to trigger use-after-free conditions to potentially execute code.

The weakness was released 10/14/2022. The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2022-42720 since 10/10/2022. There are neither technical details nor an exploit publicly available.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org.

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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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: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

10/10/2022 🔍
10/14/2022 +4 days 🔍
10/14/2022 +0 days 🔍
11/07/2022 +24 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: DLA 3173-1
Status: Confirmed

CVE: CVE-2022-42720 (🔍)

Entryinfo

Created: 10/14/2022 08:26
Updated: 11/07/2022 16:22
Changes: 10/14/2022 08:26 (41), 11/07/2022 16:15 (1), 11/07/2022 16:22 (11)
Complete: 🔍