CVE-2022-47946

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in the Linux kernel 5.10.x before 5.10.155. A use-after-free in io_sqpoll_wait_sq in fs/io_uring.c allows an attacker to crash the kernel, resulting in denial of service. finish_wait can be skipped. An attack can occur in some situations by forking a process and then quickly terminating it. NOTE: later kernel versions, such as the 5.15 longterm series, substantially changed the implementation of io_sqpoll_wait_sq.

Se descubrió un problema en el kernel de Linux 5.10.x anterior a 5.10.155. Un use after free en io_sqpoll_wait_sq en fs/io_uring.c permite a un atacante bloquear el kernel, lo que resulta en denegación de servicio. Finish_wait se puede omitir. En algunas situaciones puede ocurrir un ataque al bifurcar un proceso y luego finalizarlo rápidamente. NOTA: las versiones posteriores del kernel, como la serie a largo plazo 5.15, cambiaron sustancialmente la implementación de io_sqpoll_wait_sq.

*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

2022-12-23 CVE Reserved
2022-12-23 CVE Published
2024-08-03 CVE Updated
2024-08-03 First Exploit
2024-08-13 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-416: Use After Free

CAPEC

References (3)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2022/12/27/1	Mailing List

URL	Date	SRC
https://www.openwall.com/lists/oss-security/2022/12/22/2	2024-08-03

URL	Date	SRC
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.10.161&id=0f544353fec8e717d37724d95b92538e1de79e86	2023-01-04

URL	Date	SRC

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"				>= 5.10 < 5.10.155 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10 < 5.10.155"		-		Affected