iommu: Fix NULL group->domain dereference in pci_dev_reset_iommu_done()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-53280
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-26 20:17:19 UTC
Updated2026-07-08 03:58:12 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.001070000 probability, percentile 0.013860000 (date 2026-07-09)

Problem Types: CWE-476

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All
Operating System Linux Linux Kernel 7.1 rc1 All All
Operating System Linux Linux Kernel 7.1 rc2 All All
Operating System Linux Linux Kernel 7.1 rc3 All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c279e83953d937470f8a6e69b69f62608714f13f 17194cd0dd236e732d116d50840d795ca50ef196 git Not specified
CNA Linux Linux affected c279e83953d937470f8a6e69b69f62608714f13f d769711fcddd005f1e654b3bde547140917fe696 git Not specified
CNA Linux Linux affected 7.0 Not specified
CNA Linux Linux unaffected 7.0 semver Not specified
CNA Linux Linux unaffected 7.0.10 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/d769711fcddd005f1e654b3bde547140917fe696 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/17194cd0dd236e732d116d50840d795ca50ef196 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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