CVE-2021-47606

Severity CVSS v4.0:

Pending analysis

Type:

CWE-369 Divide By Zero

Publication date:

19/06/2024

Last modified:

31/10/2024

Description

In the Linux kernel, the following vulnerability has been resolved: net: netlink: af_netlink: Prevent empty skb by adding a check on len. Adding a check on len parameter to avoid empty skb. This prevents a division error in netem_enqueue function which is caused when skb->len=0 and skb->data_len=0 in the randomized corruption step as shown below. skb->data[prandom_u32() % skb_headlen(skb)] ^= 1

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::::::::		4.4.296 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.5 (including)	4.9.294 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.10 (including)	4.14.259 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.15 (including)	4.19.222 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.20 (including)	5.4.167 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.87 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.10 (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::::::

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

CVE-2021-47606

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools