CVE-2021-47305

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

21/05/2024

Last modified:

12/05/2025

Description

In the Linux kernel, the following vulnerability has been resolved: dma-buf/sync_file: Don&#39;t leak fences on merge failure Each add_fence() call does a dma_fence_get() on the relevant fence. In the error path, we weren&#39;t calling dma_fence_put() so all those fences got leaked. Also, in the krealloc_array failure case, we weren&#39;t freeing the fences array. Instead, ensure that i and fences are always zero-initialized and dma_fence_put() all the fences and kfree(fences) on every error path.

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::::::::	4.9 (including)	4.14.241 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.15 (including)	4.19.199 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.20 (including)	5.4.135 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.53 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.13.5 (excluding)
cpe:2.3:o:linux:linux_kernel:5.14:rc1::::::

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

CVE-2021-47305

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools