// For flags

CVE-2024-50094

sfc: Don't invoke xdp_do_flush() from netpoll.

Severity Score

"-"
*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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

sfc: Don't invoke xdp_do_flush() from netpoll.

Yury reported a crash in the sfc driver originated from
netpoll_send_udp(). The netconsole sends a message and then netpoll
invokes the driver's NAPI function with a budget of zero. It is
dedicated to allow driver to free TX resources, that it may have used
while sending the packet.

In the netpoll case the driver invokes xdp_do_flush() unconditionally,
leading to crash because bpf_net_context was never assigned.

Invoke xdp_do_flush() only if budget is not zero.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sfc: No invoque xdp_do_flush() desde netpoll. Yury informó de un fallo en el controlador sfc originado desde netpoll_send_udp(). La netconsole envía un mensaje y luego netpoll invoca la función NAPI del controlador con un presupuesto de cero. Está dedicada a permitir que el controlador libere recursos TX, que puede haber usado al enviar el paquete. En el caso de netpoll, el controlador invoca xdp_do_flush() incondicionalmente, lo que provoca un fallo porque bpf_net_context nunca se asignó. Invoque xdp_do_flush() solo si el presupuesto no es cero.

*Credits: N/A
CVSS Scores
Attack Vector
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Attack Complexity
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Privileges Required
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User Interaction
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Scope
-
Confidentiality
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Integrity
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Availability
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* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2024-10-21 CVE Reserved
  • 2024-11-05 CVE Published
  • 2024-11-06 EPSS Updated
  • 2024-11-19 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
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"
 >= 6.11 < 6.11.4
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.11 < 6.11.4"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 6.11 < 6.12
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.11 < 6.12"
en
Affected