{"cve":"CVE-2022-48894","nvd":{"published":"2024-08-21T07:15:05.527","modified":"2026-06-17T05:16:32.970","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/arm-smmu-v3: Don't unregister on shutdown\n\nSimilar to SMMUv2, this driver calls iommu_device_unregister() from the\nshutdown path, which removes the IOMMU groups with no coordination\nwhatsoever with their users - shutdown methods are optional in device\ndrivers. This can lead to NULL pointer dereferences in those drivers'\nDMA API calls, or worse.\n\nInstead of calling the full arm_smmu_device_remove() from\narm_smmu_device_shutdown(), let's pick only the relevant function call -\narm_smmu_device_disable() - more or less the reverse of\narm_smmu_device_reset() - and call just that from the shutdown path.","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":["CWE-476"],"references":["https://git.kernel.org/stable/c/32ea2c57dc216b6ad8125fa680d31daa5d421c95","https://git.kernel.org/stable/c/ead3e6c79479890444c777fd329afc125fecde48"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:54:16.205165117+00:00"},"epss":{"cve":"CVE-2022-48894","score":0.00205,"percentile":0.10542,"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."]}