Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2021-47105

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
04/03/2024
Last modified:
14/02/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ice: xsk: return xsk buffers back to pool when cleaning the ring<br /> <br /> Currently we only NULL the xdp_buff pointer in the internal SW ring but<br /> we never give it back to the xsk buffer pool. This means that buffers<br /> can be leaked out of the buff pool and never be used again.<br /> <br /> Add missing xsk_buff_free() call to the routine that is supposed to<br /> clean the entries that are left in the ring so that these buffers in the<br /> umem can be used by other sockets.<br /> <br /> Also, only go through the space that is actually left to be cleaned<br /> instead of a whole ring.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.5 (including) 5.15.12 (excluding)
cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc6:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools