CVE-2021-47325

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected software

VendorProductVersions
LinuxLinux>= d4a44f0750bb9bf7c44c22444a482756b2344a79, < b11220803ad14a2a880cc06d8e01fe2548cc85b0; >= d4a44f0750bb9bf7c44c22444a482756b2344a79, < 43d1aaa1965f9b58035196dac49b1e1e6c9c25eb; >= d4a44f0750bb9bf7c44c22444a482756b2344a79, < 0f0c5ea09139777d90729d408b807021f2ea6492; >= d4a44f0750bb9bf7c44c22444a482756b2344a79, < 5f9741a9a91f25c89e04b408cd61e3ab050ce24b; >= d4a44f0750bb9bf7c44c22444a482756b2344a79, < 7c8f176d6a3fa18aa0f8875da6f7c672ed2a8554
LinuxLinux5.0

References

Timeline

Published
May 21, 2024
Last modified
Jun 17, 2026
NVD status
Analyzed

Related CVEs from 2021

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CVE-2021-47325: Medium severity, CVSS 5.5 | Vulnix