Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2021-47159

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
25/03/2024
Last modified:
13/03/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> net: dsa: fix a crash if -&gt;get_sset_count() fails<br /> <br /> If ds-&gt;ops-&gt;get_sset_count() fails then it "count" is a negative error<br /> code such as -EOPNOTSUPP. Because "i" is an unsigned int, the negative<br /> error code is type promoted to a very high value and the loop will<br /> corrupt memory until the system crashes.<br /> <br /> Fix this by checking for error codes and changing the type of "i" to<br /> just int.

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:*:*:*:*:*:*:*:* 4.7 (including) 4.19.193 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.20 (including) 5.4.124 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.5 (including) 5.10.42 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.11 (including) 5.12.9 (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:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools