OESA-2026-1761 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: In the Linux kernel, the following vulnerability has been resolved: iommu/s390: Implement blocking domain This fixes a crash when surprise hot-unplugging a PCI device. This crash happens because during hot-unplug...

CVE-2025-39958

In the Linux kernel, the following vulnerability has been resolved: iommu/s390: Make attach succeed when the device was surprise removed When a PCI device is removed with surprise hotplug, there may still be attempts to attach the device to the default domain as part of tear down via...

CVE-2025-39958

CVE-2025-39958 concerns the Linux kernel IOMMU on s390: when a PCI device is surprise-removed, teardown may still attempt to attach to the default domain, causing zpci_register_ioat() to fail and s390_iommu_attach_device() to error out. The fix changes the attach path to proceed as if registratio...

CVE-2025-39939 iommu/s390: Fix memory corruption when using identity domain

In the Linux kernel, the following vulnerability has been resolved: iommu/s390: Fix memory corruption when using identity domain zpcigetiommuctrs returns counter information to be reported as part of device statistics; these counters are stored as part of the s390domain. The problem, however, is...