CVE-2021-47325

low-risk
Published 2024-05-21

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.

Do I need to act?

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0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Linux

References (10)

Patch https://git.kernel.org/stable/c/0f0c5ea09139777d90729d408b807021f2ea6492
Patch https://git.kernel.org/stable/c/43d1aaa1965f9b58035196dac49b1e1e6c9c25eb
Patch https://git.kernel.org/stable/c/5f9741a9a91f25c89e04b408cd61e3ab050ce24b
Patch https://git.kernel.org/stable/c/7c8f176d6a3fa18aa0f8875da6f7c672ed2a8554
Patch https://git.kernel.org/stable/c/b11220803ad14a2a880cc06d8e01fe2548cc85b0
Patch https://git.kernel.org/stable/c/0f0c5ea09139777d90729d408b807021f2ea6492
Patch https://git.kernel.org/stable/c/43d1aaa1965f9b58035196dac49b1e1e6c9c25eb
Patch https://git.kernel.org/stable/c/5f9741a9a91f25c89e04b408cd61e3ab050ce24b
Patch https://git.kernel.org/stable/c/7c8f176d6a3fa18aa0f8875da6f7c672ed2a8554
Patch https://git.kernel.org/stable/c/b11220803ad14a2a880cc06d8e01fe2548cc85b0
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal