Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2021-47113

Severity CVSS v4.0:
Pending analysis
Type:
CWE-416 Use After Free
Publication date:
15/03/2024
Last modified:
13/03/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> btrfs: abort in rename_exchange if we fail to insert the second ref<br /> <br /> Error injection stress uncovered a problem where we&amp;#39;d leave a dangling<br /> inode ref if we failed during a rename_exchange. This happens because<br /> we insert the inode ref for one side of the rename, and then for the<br /> other side. If this second inode ref insert fails we&amp;#39;ll leave the first<br /> one dangling and leave a corrupt file system behind. Fix this by<br /> aborting if we did the insert for the first inode ref.

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:*:*:*:*:*:*:*:* 5.10.43 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.11 (including) 5.12.10 (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:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools