CVE-2021-47325
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().
Does this matter?
Lower severity and a low EPSS score (0.25%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.25% probability · 16th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0f0c5ea09139777d90729d408b807021f2ea6492Patch
- https://git.kernel.org/stable/c/43d1aaa1965f9b58035196dac49b1e1e6c9c25ebPatch
- https://git.kernel.org/stable/c/5f9741a9a91f25c89e04b408cd61e3ab050ce24bPatch
- https://git.kernel.org/stable/c/7c8f176d6a3fa18aa0f8875da6f7c672ed2a8554Patch
- https://git.kernel.org/stable/c/b11220803ad14a2a880cc06d8e01fe2548cc85b0Patch
- https://git.kernel.org/stable/c/0f0c5ea09139777d90729d408b807021f2ea6492Patch
- https://git.kernel.org/stable/c/43d1aaa1965f9b58035196dac49b1e1e6c9c25ebPatch
- https://git.kernel.org/stable/c/5f9741a9a91f25c89e04b408cd61e3ab050ce24bPatch
- https://git.kernel.org/stable/c/7c8f176d6a3fa18aa0f8875da6f7c672ed2a8554Patch
- https://git.kernel.org/stable/c/b11220803ad14a2a880cc06d8e01fe2548cc85b0Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.