The cleaning up of PCI devices which were assigned to guests, and the
associated removal of tracking structures for IRQs used by the devices
occurs relatively early in the process. Unfortunately after that point
the guest about to be terminated could cause its device model (DM) to
re-establish such tracking structures, by having it bind one or more IRQs
anew. While some of those tracking structures would still be cleaned up
later on, at least one would not be.
Analysis
No analysis available yet.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Xen | Xen | unknown |
|
No data.
No data.
No data available yet.
Vendor Workaround
Running only PV or PVH guests will avoid the vulnerability. Running only HVM guests without passing through PCI devices to them will also avoid the vulnerability.
Tracking
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No advisories yet.
| Link | Providers |
|---|---|
| https://xenbits.xenproject.org/xsa/advisory-509.html |
|
Tue, 08 Sep 2026 12:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | When guests are terminated, various pieces of cleanup need carrying out. The cleaning up of PCI devices which were assigned to guests, and the associated removal of tracking structures for IRQs used by the devices occurs relatively early in the process. Unfortunately after that point the guest about to be terminated could cause its device model (DM) to re-establish such tracking structures, by having it bind one or more IRQs anew. While some of those tracking structures would still be cleaned up later on, at least one would not be. | |
| Title | x86: DMs may cause mem leak by IRQ binding | |
| References |
|
Subscriptions
No data.
MITRE
Status: PUBLISHED
Assigner: XEN
Published:
Updated: 2026-09-08T12:10:52.643Z
Reserved: 2026-07-14T10:28:12.655Z
Link: CVE-2026-62437
Vulnrichment
No data.
NVD
No data.
Redhat
No data.
OpenCVE Enrichment
No data.
No weakness.