CVE-2021-47558

net: stmmac: Disable Tx queues when reconfiguring the interface

Severity Score

"-"

*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

In the Linux kernel, the following vulnerability has been resolved:

net: stmmac: Disable Tx queues when reconfiguring the interface

The Tx queues were not disabled in situations where the driver needed to
stop the interface to apply a new configuration. This could result in a
kernel panic when doing any of the 3 following actions:
* reconfiguring the number of queues (ethtool -L)
* reconfiguring the size of the ring buffers (ethtool -G)
* installing/removing an XDP program (ip l set dev ethX xdp)

Prevent the panic by making sure netif_tx_disable is called when stopping
an interface.

Without this patch, the following kernel panic can be observed when doing
any of the actions above:

Unable to handle kernel paging request at virtual address ffff80001238d040
[....]
Call trace:
dwmac4_set_addr+0x8/0x10
dev_hard_start_xmit+0xe4/0x1ac
sch_direct_xmit+0xe8/0x39c
__dev_queue_xmit+0x3ec/0xaf0
dev_queue_xmit+0x14/0x20
[...]
[ end trace 0000000000000002 ]---

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: net: stmmac: Deshabilitar las colas de Tx al reconfigurar la interfaz Las colas de Tx no se deshabilitaron en situaciones en las que el controlador necesitaba detener la interfaz para aplicar una nueva configuración. Esto podría provocar un pánico en el kernel al realizar cualquiera de las 3 acciones siguientes: * reconfigurar el número de colas (ethtool -L) * reconfigurar el tamaño de los búferes circulares (ethtool -G) * instalar/eliminar un programa XDP (ip l set dev ethX xdp) Evite el pánico asegurándose de que se llame a netif_tx_disable al detener una interfaz. Sin este parche, se puede observar el siguiente pánico del kernel al realizar cualquiera de las acciones anteriores: No se puede manejar la solicitud de paginación del kernel en la dirección virtual ffff80001238d040 [....] Seguimiento de llamadas: dwmac4_set_addr+0x8/0x10 dev_hard_start_xmit+0xe4/0x1ac sch_direct_xmit+ 0xe8/0x39c __dev_queue_xmit+0x3ec/0xaf0 dev_queue_xmit+0x14/0x20 [...] [fin de seguimiento 0000000000000002]---

*Credits: N/A

CVSS Scores

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-05-24 CVE Reserved
2024-05-24 CVE Published
2024-05-25 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (3)

URL	Tag	Source
https://git.kernel.org/stable/c/0366f7e06a6bee7eace3946a6b67fb88b828bc5c	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/a92f0eebb8dc008b9e8c51c6f7b8c93b27a29a43	2021-12-01
https://git.kernel.org/stable/c/b270bfe697367776eca2e6759a71d700fb8d82a2	2021-11-26

URL	Date	SRC

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"				>= 5.10 < 5.15.6 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10 < 5.15.6"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.10 < 5.16 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10 < 5.16"		en		Affected