CVE-2026-97593

Summary

In the Linux kernel, the following vulnerability has been resolved:

iommu/s390: Fix NULL dereference in iova_to_phys() with ZPCI_TABLE_TYPE_RFX

When using a 5-level translation table via ZPCI_TABLE_TYPE_RFX get_rso_from_iova() returns NULL when the region-first entry is invalid. Yet in get_rto_from_iova() the region-second origin rso is not checked to be non-NULL before accessing rso[rsx] leading to a NULL pointer dereference instead of a NULL return when iova_to_phys() is called on a unmapped IOVA. Fix this by adding the missing NULL check.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux81244074b518aeb90de5f68e7e825564c29c5c50 < d0502ed0a1aae97e2ab7a21545903ba612d9f02eaffected
LinuxLinux81244074b518aeb90de5f68e7e825564c29c5c50 < 41b5e0ce6801bf04d8fd3bca46e8c393349ebd5caffected
LinuxLinux81244074b518aeb90de5f68e7e825564c29c5c50 < 20db6573301e66cd65ebf6c130b6563c69374d9daffected
LinuxLinux6.16affected
LinuxLinux0 < 6.16unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2.7 <= 7.2.*unaffected
LinuxLinux7.3-rc3 <= *unaffected

Weaknesses

References