CVE-2021-47325 (GCVE-0-2021-47325)

Vulnerability from cvelistv5 – Published: 2024-05-21 14:35 – Updated: 2025-12-18 11:36
VLAI?
Title
iommu/arm-smmu: Fix arm_smmu_device refcount leak in address translation
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d4a44f0750bb9bf7c44c22444a482756b2344a79 , < b11220803ad14a2a880cc06d8e01fe2548cc85b0 (git)
Affected: d4a44f0750bb9bf7c44c22444a482756b2344a79 , < 43d1aaa1965f9b58035196dac49b1e1e6c9c25eb (git)
Affected: d4a44f0750bb9bf7c44c22444a482756b2344a79 , < 0f0c5ea09139777d90729d408b807021f2ea6492 (git)
Affected: d4a44f0750bb9bf7c44c22444a482756b2344a79 , < 5f9741a9a91f25c89e04b408cd61e3ab050ce24b (git)
Affected: d4a44f0750bb9bf7c44c22444a482756b2344a79 , < 7c8f176d6a3fa18aa0f8875da6f7c672ed2a8554 (git)
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    Linux Linux Affected: 5.0
Unaffected: 0 , < 5.0 (semver)
Unaffected: 5.4.134 , ≤ 5.4.* (semver)
Unaffected: 5.10.52 , ≤ 5.10.* (semver)
Unaffected: 5.12.19 , ≤ 5.12.* (semver)
Unaffected: 5.13.4 , ≤ 5.13.* (semver)
Unaffected: 5.14 , ≤ * (original_commit_for_fix)
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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.