CVE-2026-62430
Fixed in a distro release EPSS <1%CVSS 7.5
Accesses to the CMOS memory contents are done using an indirect IO port pair. Therefore Xen needs to cache the guest chosen index, and one of the usages of the index didn't take the necessary locking to avoid concurrent changes. As a result, a guest could change the index after it being checked, causing a subsequent out-of-bound read access to the contents of an array.
Products: xen
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.21 | xen | 4.19.6-r0 |
| Alpine 3.22 | xen | 4.20.4-r0 |
| Alpine 3.23 | xen | 4.20.4-r0 |
| Alpine 3.24 | xen | 4.21.2-r0 |
| Debian 12 | xen | 4.17.7-0+deb12u1 |
| Debian 13 | xen | 4.20.3+127-gc42374a105-0+deb13u1 |
| Debian 14 | xen | 4.20.3+127-gc42374a105-1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | xen | 4.16.7_12-150400.4.89.3 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | xen | 4.16.7_12-150400.4.89.3 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | xen | 4.17.6_14-150500.3.76.3 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | xen | 4.17.6_14-150500.3.76.3 |
| SUSE Linux Enterprise Micro 5.3 | xen | 4.16.7_12-150400.4.89.3 |
| SUSE Linux Enterprise Micro 5.4 | xen | 4.16.7_12-150400.4.89.3 |
| SUSE Linux Enterprise Micro 5.5 | xen | 4.17.6_14-150500.3.76.3 |
| 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 12 SP5-LTSS | xen | 4.12.4_72-3.148.4 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | xen | 4.16.7_12-150400.4.89.3 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | xen | 4.17.6_14-150500.3.76.3 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | xen | 4.18.5_20-150600.3.53.3 |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | xen | 4.12.4_72-3.148.4 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | xen | 4.16.7_12-150400.4.89.3 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | xen | 4.17.6_14-150500.3.76.3 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | xen | 4.18.5_20-150600.3.53.3 |
| 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_02-1.1 |