CVE-2021-47236

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

21/05/2024

Last modified:

29/04/2025

Description

In the Linux kernel, the following vulnerability has been resolved: net: cdc_eem: fix tx fixup skb leak when usbnet transmit a skb, eem fixup it in eem_tx_fixup(), if skb_copy_expand() failed, it return NULL, usbnet_start_xmit() will have no chance to free original skb. fix it by free orginal skb in eem_tx_fixup() first, then check skb clone status, if failed, return NULL to usbnet.

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::::::::	2.6.30 (including)	4.4.274 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.5 (including)	4.9.274 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.10 (including)	4.14.238 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.15 (including)	4.19.196 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.20 (including)	5.4.128 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.46 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.12.13 (excluding)
cpe:2.3:o:linux:linux_kernel:5.13:rc1::::::
cpe:2.3:o:linux:linux_kernel:5.13:rc2::::::
cpe:2.3:o:linux:linux_kernel:5.13:rc3::::::
cpe:2.3:o:linux:linux_kernel:5.13:rc4::::::
cpe:2.3:o:linux:linux_kernel:5.13:rc5::::::
cpe:2.3:o:linux:linux_kernel:5.13:rc6::::::

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

CVE-2021-47236

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools