CVE-2021-47325

iommu/arm-smmu: Fix arm_smmu_device refcount leak in address translation

EPSS 0.2%

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

21 May 2024Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

Affected products

Linux · Linux

References

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