CVE-2020-14381

kernel: referencing inode of removed superblock in get_futex_key() causes UAF

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A flaw was found in the Linux kernel’s futex implementation. This flaw allows a local attacker to corrupt system memory or escalate their privileges when creating a futex on a filesystem that is about to be unmounted. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Se encontró un fallo en la implementación de futex del kernel de Linux. Este fallo permite a un atacante local corromper la memoria del sistema o aumentar sus privilegios al crear un futex en un sistema de archivos que está a punto de ser desmontado. La mayor amenaza de esta vulnerabilidad es la confidencialidad, la integridad y la disponibilidad del sistema

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-06-17 CVE Reserved
2020-12-03 CVE Published
2022-04-07 First Exploit
2023-03-08 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-416: Use After Free

CAPEC

References (4)

URL	Tag	Source

URL	Date	SRC
https://github.com/nanopathi/linux-4.19.72_CVE-2020-14381	2022-04-07

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=1874311	2020-11-04
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8019ad13ef7f64be44d4f892af9c840179009254	2020-12-08

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2020-14381	2020-11-04

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"				< 5.6 Search vendor "Linux" for product "Linux Kernel" and version " < 5.6"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.6 Search vendor "Linux" for product "Linux Kernel" and version "5.6"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.6 Search vendor "Linux" for product "Linux Kernel" and version "5.6"		rc1		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.6 Search vendor "Linux" for product "Linux Kernel" and version "5.6"		rc2		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.6 Search vendor "Linux" for product "Linux Kernel" and version "5.6"		rc3		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.6 Search vendor "Linux" for product "Linux Kernel" and version "5.6"		rc4		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.6 Search vendor "Linux" for product "Linux Kernel" and version "5.6"		rc5		Affected