CVE-2026-62437
Fixed in a distro release EPSS <1%CVSS 6.5
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.
Products: xen
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.21 | xen | 4.19.6-r1 |
| Alpine 3.22 | xen | 4.20.4-r1 |
| Alpine 3.23 | xen | 4.20.4-r1 |
| Alpine 3.24 | xen | 4.21.2-r1 |
| Debian 12 | xen | no fix |
| Debian 13 | xen | 4.20.4+39-gf1e1321c87-0+deb13u1 |
| Debian 14 | xen | 4.20.4+39-gf1e1321c87-1 |
| SUSE Linux Enterprise Micro 5.3 | xen | 4.16.7_14-150400.4.92.1 |
| SUSE Linux Enterprise Micro 5.4 | xen | 4.16.7_14-150400.4.92.1 |
| SUSE Linux Enterprise Micro 5.5 | xen | 4.17.6_16-150500.3.79.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | xen | 4.20.4_04-150700.3.46.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | xen | 4.20.4_04-150700.3.46.1 |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | xen | 4.12.4_74-3.151.1 |
| Ubuntu 16.04 LTS | xen | no fix |
| Ubuntu 18.04 LTS | xen | no fix |
| Ubuntu 20.04 LTS | xen | no fix |
| Ubuntu 22.04 LTS | xen | no fix |
| Ubuntu 24.04 LTS | xen | no fix |
| Ubuntu 26.04 LTS | xen | no fix |
| Ubuntu 26.10 | xen | no fix |
| openSUSE Tumbleweed | xen | 4.22.0_04-1.1 |