Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2021-47190

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
10/04/2024
Last modified:
07/01/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> perf bpf: Avoid memory leak from perf_env__insert_btf()<br /> <br /> perf_env__insert_btf() doesn&amp;#39;t insert if a duplicate BTF id is<br /> encountered and this causes a memory leak. Modify the function to return<br /> a success/error value and then free the memory if insertion didn&amp;#39;t<br /> happen.<br /> <br /> v2. Adds a return -1 when the insertion error occurs in<br /> perf_env__fetch_btf. This doesn&amp;#39;t affect anything as the result is<br /> never checked.

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:*:*:*:*:*:*:*:* 5.1 (including) 5.4.162 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.5 (including) 5.10.82 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.11 (including) 5.15.5 (excluding)

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


References to Advisories, Solutions, and Tools