CVE-2022-23035

Severity Score

4.6

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Insufficient cleanup of passed-through device IRQs The management of IRQs associated with physical devices exposed to x86 HVM guests involves an iterative operation in particular when cleaning up after the guest's use of the device. In the case where an interrupt is not quiescent yet at the time this cleanup gets invoked, the cleanup attempt may be scheduled to be retried. When multiple interrupts are involved, this scheduling of a retry may get erroneously skipped. At the same time pointers may get cleared (resulting in a de-reference of NULL) and freed (resulting in a use-after-free), while other code would continue to assume them to be valid.

Un saneo insuficiente de las IRQs de dispositivos pasados. La administración de las IRQs asociadas a dispositivos físicos expuestos a huéspedes x86 HVM implica una operación iterativa en particular cuando es limpiada después del uso del dispositivo por parte del huésped. En el caso de que una interrupción no esté quieta todavía en el momento en que es invocado este saneo, el intento de saneo puede ser programado para ser reintentado. Cuando se presentan varias interrupciones involucradas, esta programación de un reintento puede omitirse erróneamente. Al mismo tiempo, los punteros pueden ser borrados (resultando en una desreferencia de NULL) y liberados (resultando en un uso de memoria previamente liberada), mientras que otro código continuaría asumiendo que son válidos

*Credits: This issue was discovered by Julien Grall of Amazon.

Attack Vector

Physical

Attack Complexity

Low

Privileges Required

None

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

2022-01-10 CVE Reserved
2022-01-25 CVE Published
2024-08-03 CVE Updated
2024-08-31 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-459: Incomplete Cleanup

CAPEC

References (5)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
http://www.openwall.com/lists/oss-security/2022/01/25/4	2023-11-07

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OMR6UBGJW6JKND7IILGQ2CU35EQPF3E3	2023-11-07
https://security.gentoo.org/glsa/202208-23	2023-11-07
https://www.debian.org/security/2022/dsa-5117	2023-11-07
https://xenbits.xenproject.org/xsa/advisory-395.txt	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				>= 4.6.0 Search vendor "Xen" for product "Xen" and version " >= 4.6.0"		x86		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0"		-		Affected