CVE-2021-37576

kernel: powerpc: KVM guest OS users can cause host OS memory corruption

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform allows KVM guest OS users to cause host OS memory corruption via rtas_args.nargs, aka CID-f62f3c20647e.

El archivo arch/powerpc/kvm/book3s_rtas.c en el kernel de Linux versiones hasta 5.13.5, en la plataforma powerpc permite a usuarios del Sistema Operativo invitado de KVM causar una corrupción en la memoria del Sistema Operativo host por medio de rtas_args.nargs, también se conoce como CID-f62f3c20647e

A flaw was found on the Linux kernel. On the PowerPC platform, the KVM guest allows the OS users to cause host OS memory corruption via rtas_args.nargs. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

*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

2021-07-26 CVE Reserved
2021-07-26 CVE Published
2023-11-08 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-787: Out-of-bounds Write

CAPEC

References (9)

URL	Tag	Source
https://lore.kernel.org/linuxppc-dev/87im0x1lqi.fsf%40mpe.ellerman.id.au/T/#u	X_refsource_misc
https://security.netapp.com/advisory/ntap-20210917-0005	Third Party Advisory

URL	Date	SRC
http://www.openwall.com/lists/oss-security/2021/07/27/2	2024-08-04

URL	Date	SRC
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f62f3c20647ebd5fb6ecb8f0b477b9281c44c10a	2023-11-07

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDFA7DSQIPM7XPNXJBXFWXHJFVUBCAG6	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z2YZ2DNURMYYVDT2NYAFDESJC35KCUDS	2023-11-07
https://www.debian.org/security/2021/dsa-4978	2023-11-07
https://access.redhat.com/security/cve/CVE-2021-37576	2021-10-26
https://bugzilla.redhat.com/show_bug.cgi?id=1986506	2021-10-26

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"				>= 3.10 < 4.4.277 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.10 < 4.4.277"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.5 < 4.9.277 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 4.9.277"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.10 < 4.14.241 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.10 < 4.14.241"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.15 < 4.19.199 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 4.19.199"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.20 < 5.4.136 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.20 < 5.4.136"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.5 < 5.10.54 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.10.54"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.11 < 5.13.6 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.11 < 5.13.6"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				33 Search vendor "Fedoraproject" for product "Fedora" and version "33"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected