{"id":"CVE-2026-97593","title":"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 …","summary":"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 …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 81244074b518aeb90de5f68e7e825564c29c5c50 < d0502ed0a1aae97e2ab7a21545903ba612d9f02e","Linux >= 81244074b518aeb90de5f68e7e825564c29c5c50 < 41b5e0ce6801bf04d8fd3bca46e8c393349ebd5c","Linux >= 81244074b518aeb90de5f68e7e825564c29c5c50 < 20db6573301e66cd65ebf6c130b6563c69374d9d","Linux 6.16"],"published":"2026-09-25","updated":"2026-09-25","sourceUpdated":"2026-09-25T11:17:10.547","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97593","references":[{"url":"https://git.kernel.org/stable/c/20db6573301e66cd65ebf6c130b6563c69374d9d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/41b5e0ce6801bf04d8fd3bca46e8c393349ebd5c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d0502ed0a1aae97e2ab7a21545903ba612d9f02e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-25T11:06:38.905Z","slug":"CVE-2026-97593","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}