CVE-2026-62437

Summary

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.

Affected Software

Weaknesses

Workarounds

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.

ADP Enrichment

CVE Program Container

Additional References

• http://xenbits.xen.org/xsa/advisory-509.html
• http://www.openwall.com/lists/oss-security/2026/09/08/6

References

• https://xenbits.xenproject.org/xsa/advisory-509.html

• ←Previous
• Next→