UBUNTU-CVE-2026-62437
Dashboard / Vulnerabilities / UBUNTU-CVE-2026-62437
Summary:
Details: 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. A HVM guest with one or more PCI devices assigned can cause a memory leak in the hypervisor, possibly leading to Denial of Service (DoS) of the entire host. All Xen versions from at least 3.2 onwards are affected.
References: https://ubuntu.com/security/CVE-2026-62437, https://www.cve.org/CVERecord?id=CVE-2026-62437
Affected packages
Package
Name: xen
Purl: pkg:deb/ubuntu/xen?arch=source&distro=xenial
Affected ranges
Type: ECOSYSTEM
Events:
