CVE-2022-4129

kernel: l2tp: missing lock when clearing sk_user_data can lead to NULL pointer dereference

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A flaw was found in the Linux kernel's Layer 2 Tunneling Protocol (L2TP). A missing lock when clearing sk_user_data can lead to a race condition and NULL pointer dereference. A local user could use this flaw to potentially crash the system causing a denial of service.

Se encontró una falla en Layer 2 Tunneling Protocol (L2TP) del kernel de Linux. Un bloqueo faltante al borrar sk_user_data puede provocar una condición de ejecución y una desreferencia del puntero NULL. Un usuario local podría utilizar esta falla para bloquear potencialmente el sistema y provocar una Denegación de Servicio (DoS).

*Credits: N/A

CVSS Scores

NISTv3.1 5.5

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-11-23 CVE Reserved
2022-11-28 CVE Published
2023-03-08 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-476: NULL Pointer Dereference
CWE-667: Improper Locking

CAPEC

References (8)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
https://lore.kernel.org/all/20221114191619.124659-1-jakub%40cloudflare.com/t
https://lore.kernel.org/netdev/20221121085426.21315-1-jakub%40cloudflare.com/t

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7X5SPXMXXFANDASPCKER2JIQO2F3UHCP	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AM5KFIE6JNZXHBA5A2KYDZAT3MEX2B67	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JOKXNIM2R4FQCDRQV67UMAY6EBC72QFG	2023-11-07
https://access.redhat.com/security/cve/CVE-2022-4129	2024-01-25
https://bugzilla.redhat.com/show_bug.cgi?id=2134528	2024-01-25

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Layer 2 Tunneling Protocol Search vendor "Linux" for product "Layer 2 Tunneling Protocol"				< 6.0 Search vendor "Linux" for product "Layer 2 Tunneling Protocol" and version " < 6.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				35 Search vendor "Fedoraproject" for product "Fedora" and version "35"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				36 Search vendor "Fedoraproject" for product "Fedora" and version "36"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				37 Search vendor "Fedoraproject" for product "Fedora" and version "37"		-		Affected