---
cve: "CVE-2021-47325"
severity: "LOW"
cvss: 3.1
epss: "25%"
vendor: "Linux"
kev: false
exploited: false
published: "2024-05-21 15:15:19"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-12T16:40:10+02:00"
---

# CVE-2021-47325

> 3.1 LOW

## Beschreibung

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.

## Referenzen

- <https://git.kernel.org/stable/c/b11220803ad14a2a880cc06d8e01fe2548cc85b0>
- <https://git.kernel.org/stable/c/43d1aaa1965f9b58035196dac49b1e1e6c9c25eb>
- <https://git.kernel.org/stable/c/0f0c5ea09139777d90729d408b807021f2ea6492>
- <https://git.kernel.org/stable/c/5f9741a9a91f25c89e04b408cd61e3ab050ce24b>
- <https://git.kernel.org/stable/c/7c8f176d6a3fa18aa0f8875da6f7c672ed2a8554>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-47325) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_