In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Lock external INTx masking ops Mask operations through config space changes to DisINTx may race INTx configuration changes via ioctl. Create wrappers that add locking for paths outside of the core interrupt code. In particular, irq_type is updated holding igate, therefore testing is_intx() requires holding igate. For example clearing DisINTx from config space can otherwise race changes of the interrupt configuration. This aligns interfaces which may trigger the INTx eventfd into two camps, one side serialized by igate and the other only enabled while INTx is configured. A subsequent patch introduces synchronization for the latter flows.
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: vfio/pci: bloquear operaciones de enmascaramiento INTx externas Las operaciones de enmascaramiento a través de cambios en el espacio de configuración a DisINTx pueden acelerar los cambios de configuración de INTx a través de ioctl. Cree contenedores que agreguen bloqueo para rutas fuera del código de interrupción central. En particular, irq_type se actualiza manteniendo igate, por lo tanto, probar is_intx() requiere mantener igate. Por ejemplo, borrar DisINTx del espacio de configuración puede acelerar los cambios en la configuración de la interrupción. Esto alinea las interfaces que pueden desencadenar el evento INTx en dos campos, un lado serializado por igate y el otro solo habilitado mientras INTx está configurado. Un parche posterior introduce la sincronización para estos últimos flujos.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
| Attack Vector | LOCAL |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | LOW |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | HIGH |
| Integrity Impact | HIGH |
| Availability Impact | HIGH |
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Type: Secondary
Exploitability Score: 1.8
Impact Score: 5.9
| Source | Type | Description |
|---|---|---|
| [email protected] | Primary |
en
CWE-362
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd360696540> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd360694040> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd38545c140> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd340ad4f80> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd360696b80> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd360697a00> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd340ad5b40> | Operating System |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |