CVE-2022-33743

kernel: network backend may cause Linux netfront to use freed SKBs (XSA-405)

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

network backend may cause Linux netfront to use freed SKBs While adding logic to support XDP (eXpress Data Path), a code label was moved in a way allowing for SKBs having references (pointers) retained for further processing to nevertheless be freed.

El backend de la red puede hacer que Linux netfront use SKB liberados Al agregar lógica para admitir XDP (ruta de datos eXpress), se movió una etiqueta de código de una manera que permitía que los SKB tuvieran referencias (punteros) retenidas para un procesamiento posterior para, no obstante, ser liberados

An incomplete cleanup flaw was found in the Linux kernel’s Xen networking XDP (eXpress Data Path) subsystem. This flaw allows a local user to crash the system.

*Credits: This issue was discovered by Jan Beulich of SUSE.

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

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-06-15 CVE Reserved
2022-07-05 CVE Published
2023-03-08 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-459: Incomplete Cleanup

CAPEC

References (6)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
http://www.openwall.com/lists/oss-security/2022/07/05/5	2022-11-05
http://xenbits.xen.org/xsa/advisory-405.html	2022-11-05

URL	Date	SRC
https://www.debian.org/security/2022/dsa-5191	2022-11-05
https://xenbits.xenproject.org/xsa/advisory-405.txt	2022-11-05
https://access.redhat.com/security/cve/CVE-2022-33743	2023-05-09
https://bugzilla.redhat.com/show_bug.cgi?id=2107924	2023-05-09

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"				>= 5.9 <= 5.18 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.9 <= 5.18"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				-		-		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