Copyright © 2012 Red Hat, Inc. All rights reserved. Low 2026-06-26T00:00:00 kernel: iommu: Fix NULL group->domain dereference in pci_dev_reset_iommu_done() 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CWE-476

In the Linux kernel, the following vulnerability has been resolved: iommu: Fix NULL group->domain dereference in pci_dev_reset_iommu_done() Local sashiko review pointed it out that group->domain could be NULL when a default domain fails to allocate during the first probe, which can crash at domain->ops->attach_dev dereference in __iommu_attach_device() invoked by pci_dev_reset_iommu_done(). pci_dev_reset_iommu_prepare() is fine as an old_domain pointer can be NULL. Skip the re-attach in pci_dev_reset_iommu_done() to fix the bug.

A flaw was found in the Linux kernel's Input-Output Memory Management Unit (IOMMU) component. This vulnerability occurs when a default IOMMU domain fails to allocate during the initial probe, leading to a NULL pointer dereference. This can cause a system crash, resulting in a Denial of Service (DoS).

Red Hat Enterprise Linux 10 Fix deferred kernel Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 8 Not affected kernel Red Hat Enterprise Linux 8 Not affected kernel-rt Red Hat Enterprise Linux 9 Not affected kernel Red Hat Enterprise Linux 9 Not affected kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-53280 https://nvd.nist.gov/vuln/detail/CVE-2026-53280 https://lore.kernel.org/linux-cve-announce/2026062614-CVE-2026-53280-9318@gregkh/T