In the Linux kernel, the following vulnerability has been resolved:

iommu/arm-smmu: Fix arm_smmu_device refcount leak in address translation

The reference counting issue happens in several exception handling paths
of arm_smmu_iova_to_phys_hard(). When those error scenarios occur, the
function forgets to decrease the refcount of "smmu" increased by
arm_smmu_rpm_get(), causing a refcount leak.

Fix this issue by jumping to "out" label when those error scenarios
occur.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00022.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
d4a44f0750bb9bf7c44c22444a482756b2344a79 affected < b11220803ad14a2a880cc06d8e01fe2548cc85b0
d4a44f0750bb9bf7c44c22444a482756b2344a79 affected < 43d1aaa1965f9b58035196dac49b1e1e6c9c25eb
d4a44f0750bb9bf7c44c22444a482756b2344a79 affected < 0f0c5ea09139777d90729d408b807021f2ea6492
d4a44f0750bb9bf7c44c22444a482756b2344a79 affected < 5f9741a9a91f25c89e04b408cd61e3ab050ce24b
d4a44f0750bb9bf7c44c22444a482756b2344a79 affected < 7c8f176d6a3fa18aa0f8875da6f7c672ed2a8554
Linux Linux affected
Version Status Constraints
5.0 affected —
0 unaffected < 5.0
5.4.134 unaffected ≤ 5.4.*
5.10.52 unaffected ≤ 5.10.*
5.12.19 unaffected ≤ 5.12.*
5.13.4 unaffected ≤ 5.13.*
5.14 unaffected ≤ *

Configuration 1 [-]

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

No data.

No data.

Project Subscriptions

Vendors Products
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Linux Kernel Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/0f0c5ea09139777d90729d408b807021f2ea6492 cve-icon cve-icon
https://git.kernel.org/stable/c/43d1aaa1965f9b58035196dac49b1e1e6c9c25eb cve-icon cve-icon
https://git.kernel.org/stable/c/5f9741a9a91f25c89e04b408cd61e3ab050ce24b cve-icon cve-icon
https://git.kernel.org/stable/c/7c8f176d6a3fa18aa0f8875da6f7c672ed2a8554 cve-icon cve-icon
https://git.kernel.org/stable/c/b11220803ad14a2a880cc06d8e01fe2548cc85b0 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2024052133-CVE-2021-47325-f4e8@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2021-47325 cve-icon
https://www.cve.org/CVERecord?id=CVE-2021-47325 cve-icon
History

Tue, 14 Jan 2025 08:45:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Weaknesses NVD-CWE-Other
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
Metrics cvssV3_1

{'score': 5.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:L'}

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

Tue, 05 Nov 2024 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-12-18T11:36:45.815Z

Reserved: 2024-05-21T14:28:16.974Z

Link: CVE-2021-47325

cve-icon Vulnrichment

Updated: 2024-08-04T05:32:08.511Z

cve-icon NVD

Status : Analyzed

Published: 2024-05-21T15:15:19.613

Modified: 2025-01-13T20:04:48.480

Link: CVE-2021-47325

cve-icon Redhat

Severity : Low

Publid Date: 2024-05-21T00:00:00Z

Links: CVE-2021-47325 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses