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

CVSS Scores

NISTv3.1 5.5

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* 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
2024-05-15 EPSS Updated
2024-08-03 CVE 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