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

*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

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-03-04 CVE Reserved
2024-03-04 CVE Published
2024-03-05 EPSS Updated
2024-12-19 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (3)

URL	Tag	Source
https://git.kernel.org/stable/c/2d4238f5569722197612656163d824098208519c	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/ad6d20da2cfbe14b7b1200d15f39e65988b0b9e8	2021-12-29
https://git.kernel.org/stable/c/afe8a3ba85ec2a6b6849367e25c06a2f8e0ddd05	2021-12-17

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"				>= 5.5 < 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