CVE-2022-41218

kernel: Report vmalloc UAF in dvb-core/dmxdev

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In drivers/media/dvb-core/dmxdev.c in the Linux kernel through 5.19.10, there is a use-after-free caused by refcount races, affecting dvb_demux_open and dvb_dmxdev_release.

En el archivo drivers/media/dvb-core/dmxdev.c en el kernel de Linux versiones hasta 5.19.10, se presenta un uso de memoria previamente liberada causado por refcount races, que afecta a dvb_demux_open y dvb_dmxdev_release

A use-after-free flaw was found in the Linux kernel’s dvb-core subsystem (DVB API used by Digital TV devices) in how a user physically removed a USB device (such as a DVB demultiplexer device) while running malicious code. This flaw allows a local user to crash or potentially escalate their privileges on the system.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-09-21 CVE Reserved
2022-09-21 CVE Published
2022-10-01 First Exploit
2024-08-03 CVE Updated
2024-12-17 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-416: Use After Free

CAPEC

References (12)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2022/09/24/2	Mailing List
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=fd3d91ab1c6ab0628fe642dd570b56302c30a792
https://lists.debian.org/debian-lts-announce/2023/03/msg00000.html	Mailing List
https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html	Mailing List
https://lore.kernel.org/all/20220908132754.30532-1-tiwai%40suse.de

URL	Date	SRC
https://github.com/Tobey123/CVE-2022-41218	2022-10-01
http://www.openwall.com/lists/oss-security/2022/09/23/4	2024-08-03
http://www.openwall.com/lists/oss-security/2022/09/24/1	2024-08-03

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/media/dvb-core/dmxdev.c	2024-03-25
https://www.debian.org/security/2023/dsa-5324	2024-03-25
https://access.redhat.com/security/cve/CVE-2022-41218	2024-01-25
https://bugzilla.redhat.com/show_bug.cgi?id=2122960	2024-01-25

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				<= 5.19.10 Search vendor "Linux" for product "Linux Kernel" and version " <= 5.19.10"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0"		-		Affected