CVE-2020-27820

kernel: use-after-free in nouveau kernel module

Severity Score

4.7

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability was found in Linux kernel, where a use-after-frees in nouveau's postclose() handler could happen if removing device (that is not common to remove video card physically without power-off, but same happens if "unbind" the driver).

Se ha encontrado una vulnerabilidad en el kernel de Linux, en la que un uso de memoria previamente liberada en el manejador postclose() de nouveau podría ocurrir si se quita el dispositivo (que no es común quitar la tarjeta de vídeo físicamente sin apagar, pero lo mismo ocurre si se "desvincula" el controlador)

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-10-27 CVE Reserved
2021-11-02 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://www.oracle.com/security-alerts/cpujul2022.html	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=1901726	2022-05-10

URL	Date	SRC
https://lore.kernel.org/dri-devel/20201103194912.184413-2-jcline%40redhat.com	2024-01-30
https://lore.kernel.org/dri-devel/20201103194912.184413-3-jcline%40redhat.com	2024-01-30
https://lore.kernel.org/dri-devel/20201103194912.184413-4-jcline%40redhat.com	2024-01-30
https://access.redhat.com/security/cve/CVE-2020-27820	2022-05-10
https://lore.kernel.org/dri-devel/20201103194912.184413-2-jcline@redhat.com	2022-05-10
https://lore.kernel.org/dri-devel/20201103194912.184413-3-jcline@redhat.com	2022-05-10
https://lore.kernel.org/dri-devel/20201103194912.184413-4-jcline@redhat.com	2022-05-10

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"				> 2.6.12 < 5.4.162 Search vendor "Linux" for product "Linux Kernel" and version " > 2.6.12 < 5.4.162"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				> 5.5 < 5.10.82 Search vendor "Linux" for product "Linux Kernel" and version " > 5.5 < 5.10.82"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				> 5.11 < 5.15.5 Search vendor "Linux" for product "Linux Kernel" and version " > 5.11 < 5.15.5"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.12 Search vendor "Linux" for product "Linux Kernel" and version "2.6.12"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.12 Search vendor "Linux" for product "Linux Kernel" and version "2.6.12"		rc2		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.12 Search vendor "Linux" for product "Linux Kernel" and version "2.6.12"		rc3		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.12 Search vendor "Linux" for product "Linux Kernel" and version "2.6.12"		rc4		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.12 Search vendor "Linux" for product "Linux Kernel" and version "2.6.12"		rc5		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.12 Search vendor "Linux" for product "Linux Kernel" and version "2.6.12"		rc6		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				33 Search vendor "Fedoraproject" for product "Fedora" and version "33"		-		Affected
Oracle Search vendor "Oracle"		Communications Cloud Native Core Binding Support Function Search vendor "Oracle" for product "Communications Cloud Native Core Binding Support Function"				22.1.3 Search vendor "Oracle" for product "Communications Cloud Native Core Binding Support Function" and version "22.1.3"		-		Affected
Oracle Search vendor "Oracle"		Communications Cloud Native Core Network Exposure Function Search vendor "Oracle" for product "Communications Cloud Native Core Network Exposure Function"				22.1.1 Search vendor "Oracle" for product "Communications Cloud Native Core Network Exposure Function" and version "22.1.1"		-		Affected
Oracle Search vendor "Oracle"		Communications Cloud Native Core Policy Search vendor "Oracle" for product "Communications Cloud Native Core Policy"				22.2.0 Search vendor "Oracle" for product "Communications Cloud Native Core Policy" and version "22.2.0"		-		Affected