// For flags

CVE-2021-47105

ice: xsk: return xsk buffers back to pool when cleaning the ring

Severity Score

"-"
*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

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

ice: xsk: return xsk buffers back to pool when cleaning the ring

Currently we only NULL the xdp_buff pointer in the internal SW ring but
we never give it back to the xsk buffer pool. This means that buffers
can be leaked out of the buff pool and never be used again.

Add missing xsk_buff_free() call to the routine that is supposed to
clean the entries that are left in the ring so that these buffers in the
umem can be used by other sockets.

Also, only go through the space that is actually left to be cleaned
instead of a whole ring.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ice: xsk: devuelve los buffers xsk al grupo al limpiar el anillo. Actualmente solo hacemos NULL en el puntero xdp_buff en el anillo SW interno, pero nunca lo devolvemos al grupo de buffers xsk. Esto significa que los buffers se pueden filtrar fuera del grupo de buffers y no volver a usarse nunca más. Agregue la llamada xsk_buff_free() faltante a la rutina que se supone que limpia las entradas que quedan en el anillo para que otros sockets puedan usar estos buffers en el umem. Además, pase solo por el espacio que realmente queda por limpiar en lugar de por un anillo completo.

*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
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-03-04 CVE Reserved
  • 2024-03-04 CVE Published
  • 2024-03-05 EPSS Updated
  • 2024-08-04 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"
 >= 5.5 < 5.15.12
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.15.12"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.5 < 5.16
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.16"
en
Affected