{"id":"CVE-2026-97593","summary":"iommu/s390: Fix NULL dereference in iova_to_phys() with ZPCI_TABLE_TYPE_RFX","details":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/s390: Fix NULL dereference in iova_to_phys() with ZPCI_TABLE_TYPE_RFX\n\nWhen using a 5-level translation table via ZPCI_TABLE_TYPE_RFX\nget_rso_from_iova() returns NULL when the region-first entry is invalid.\nYet in get_rto_from_iova() the region-second origin rso is not checked\nto be non-NULL before accessing rso[rsx] leading to a NULL pointer\ndereference instead of a NULL return when iova_to_phys() is called on\na unmapped IOVA. Fix this by adding the missing NULL check.","modified":"2026-09-26T03:48:36.459751209Z","published":"2026-09-25T10:22:09.913Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97593.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/20db6573301e66cd65ebf6c130b6563c69374d9d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/41b5e0ce6801bf04d8fd3bca46e8c393349ebd5c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d0502ed0a1aae97e2ab7a21545903ba612d9f02e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97593.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97593"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"81244074b518aeb90de5f68e7e825564c29c5c50"},{"fixed":"d0502ed0a1aae97e2ab7a21545903ba612d9f02e"},{"fixed":"41b5e0ce6801bf04d8fd3bca46e8c393349ebd5c"},{"fixed":"20db6573301e66cd65ebf6c130b6563c69374d9d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-97593.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.16.0"},{"fixed":"6.18.53"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-97593.json"}}],"schema_version":"1.9.0"}