A vulnerability in the Linux kernel's IOMMU subsystem could cause a NULL pointer dereference leading to a system crash. (CVE-2026-53280)
A vulnerability in the Linux kernel's IOMMU subsystem could cause a NULL pointer dereference leading to a system crash. This occurs when the group->domain pointer is NULL due to a failure in allocating a default domain during the first probe. The issue is triggered in the pci_dev_reset_iommu_done() function when it attempts to re-attach a device to a domain. The flaw has been fixed by skipping the re-attach step if the domain pointer is NULL.
AI Analysis
Technical Summary
The Linux kernel contained a vulnerability (CVE-2026-53280) in the IOMMU code where pci_dev_reset_iommu_done() could dereference a NULL group->domain pointer. This happens if the default domain allocation fails during the first probe, causing a NULL pointer dereference at domain->ops->attach_dev in __iommu_attach_device(). The fix involves skipping the re-attachment step in pci_dev_reset_iommu_done() when the domain pointer is NULL, preventing the crash.
Potential Impact
The vulnerability can cause a denial of service by crashing the system due to a NULL pointer dereference in the IOMMU device reset path. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
A vulnerability in the Linux kernel's IOMMU subsystem could cause a NULL pointer dereference leading to a system crash. (CVE-2026-53280)
Description
A vulnerability in the Linux kernel's IOMMU subsystem could cause a NULL pointer dereference leading to a system crash. This occurs when the group->domain pointer is NULL due to a failure in allocating a default domain during the first probe. The issue is triggered in the pci_dev_reset_iommu_done() function when it attempts to re-attach a device to a domain. The flaw has been fixed by skipping the re-attach step if the domain pointer is NULL.
CVSS v3.1
Score 5.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel contained a vulnerability (CVE-2026-53280) in the IOMMU code where pci_dev_reset_iommu_done() could dereference a NULL group->domain pointer. This happens if the default domain allocation fails during the first probe, causing a NULL pointer dereference at domain->ops->attach_dev in __iommu_attach_device(). The fix involves skipping the re-attachment step in pci_dev_reset_iommu_done() when the domain pointer is NULL, preventing the crash.
Potential Impact
The vulnerability can cause a denial of service by crashing the system due to a NULL pointer dereference in the IOMMU device reset path. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-hjfw-g9qr-c456
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-53280"]
- Ecosystems
- []
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a4e4edac9d9e3dbe3288635
Added to database: 07/08/2026, 13:21:30 UTC
Last enriched: 07/08/2026, 13:32:46 UTC
Last updated: 07/31/2026, 19:24:46 UTC
Views: 7
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