{"cve":"CVE-2021-47325","nvd":{"published":"2024-05-21T15:15:19.613","modified":"2026-06-17T04:17:12.083","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/arm-smmu: Fix arm_smmu_device refcount leak in address translation\n\nThe reference counting issue happens in several exception handling paths\nof arm_smmu_iova_to_phys_hard(). When those error scenarios occur, the\nfunction forgets to decrease the refcount of \"smmu\" increased by\narm_smmu_rpm_get(), causing a refcount leak.\n\nFix this issue by jumping to \"out\" label when those error scenarios\noccur.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"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"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2021-47325","score":0.00246,"percentile":0.15974,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}