CVE-2026-97593iommu/s390: Fix NULL dereference in iova_to_phys() with ZPCI_TABLE_TYPE_RFX
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 81244074b518aeb90de5f68e7e825564c29c5c50 before d0502ed0a1aae97e2ab7a21545903ba612d9f02e; 81244074b518aeb90de5f68e7e825564c29c5c50 builds before 41b5e0ce6801bf04d8fd3bca46e8c393349ebd5c; 81244074b518aeb90de5f68e7e825564c29c5c50 builds before 20db6573301e66cd65ebf6c130b6563c69374d9d | CNA record |
References
- https://git.kernel.org/stable/c/d0502ed0a1aae97e2ab7a21545903ba612d9f02e
- https://git.kernel.org/stable/c/41b5e0ce6801bf04d8fd3bca46e8c393349ebd5c
- https://git.kernel.org/stable/c/20db6573301e66cd65ebf6c130b6563c69374d9d
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.