CVE-2020-25220

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The Linux kernel 4.9.x before 4.9.233, 4.14.x before 4.14.194, and 4.19.x before 4.19.140 has a use-after-free because skcd->no_refcnt was not considered during a backport of a CVE-2020-14356 patch. This is related to the cgroups feature.

El kernel de Linux versiones 4.9.x anteriores a 4.9.233, versiones 4.14.x anteriores a 4.14.194 y versiones 4.19.x anteriores a 4.19.140, presenta un uso de la memoria previamente liberada porque skcd-)no_refcnt no fue considerado durante un backport de un parche del CVE-2020-14356. Esto está relacionado con la funcionalidad cgroups

*Credits: N/A

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

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-09-10 CVE Reserved
2020-09-10 CVE Published
2023-03-08 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-416: Use After Free

CAPEC

References (9)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html	Mailing List
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html	Mailing List
https://security.netapp.com/advisory/ntap-20201001-0004	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=1868453	2021-01-20
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-4.14.y&id=82fd2138a5ffd7e0d4320cdb669e115ee976a26e	2021-01-20
https://www.spinics.net/lists/stable/msg405099.html	2021-01-20

URL	Date	SRC
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.194	2021-01-20
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.140	2021-01-20
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.233	2021-01-20

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"				>= 4.9.0 < 4.9.233 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9.0 < 4.9.233"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.14 < 4.14.194 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.14 < 4.14.194"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.19 < 4.19.140 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.19 < 4.19.140"		-		Affected