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).
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
| Attack Vector | LOCAL |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | LOW |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | NONE |
| Integrity Impact | NONE |
| Availability Impact | HIGH |
| Source | Type | Description |
|---|---|---|
| [email protected] | Secondary |
en
CWE-667
|
| [email protected] | Primary |
en
CWE-667
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| linux | layer_2_tunneling_protocol | * | <built-in method update of dict object at 0x7fd340cc5000> | Application |
| fedoraproject | fedora | 35 | <built-in method update of dict object at 0x7fd340cc55c0> | Operating System |
| fedoraproject | fedora | 36 | <built-in method update of dict object at 0x7fd384e13d80> | Operating System |
| fedoraproject | fedora | 37 | <built-in method update of dict object at 0x7fd3703bbb40> | Operating System |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:a:linux:layer_2_tunneling_protocol:*:*:*:*:*:*:*:* |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* |