CVE-2026-79610
Fixed in a distro release EPSS <1%CVSS 8.8
XSA-501 was about issues with v1 -> v2 and v2 -> v1 changes racing certain other grant table operations. Sadly a v2 -> v1 -> v2 change has yet another effect which wasn't accounted for: During the first change, status pages would be freed. During the second change they would be allocated again. Hence across the full pair of change the addresses of the status pages may change, rendering stale previously calculated pointers into the status array.
Products: xen
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.21 | xen | 4.19.6-r2 |
| Alpine 3.22 | xen | 4.20.4-r2 |
| Alpine 3.23 | xen | 4.20.4-r2 |
| Alpine 3.24 | xen | 4.21.2-r2 |
| 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 High Performance Computing 15 SP4-ESPOS | xen | 4.16.7_16-150400.4.95.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | xen | 4.16.7_16-150400.4.95.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | xen | 4.17.7_02-150500.3.82.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | xen | 4.17.7_02-150500.3.82.1 |
| SUSE Linux Enterprise Micro 5.3 | xen | 4.16.7_16-150400.4.95.1 |
| SUSE Linux Enterprise Micro 5.4 | xen | 4.16.7_16-150400.4.95.1 |
| SUSE Linux Enterprise Micro 5.5 | xen | 4.17.7_02-150500.3.82.1 |
| SUSE Linux Enterprise Server 12 SP5-LTSS | xen | 4.12.4_76-3.154.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | xen | 4.16.7_16-150400.4.95.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | xen | 4.17.7_02-150500.3.82.1 |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | xen | 4.12.4_76-3.154.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | xen | 4.16.7_16-150400.4.95.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | xen | 4.17.7_02-150500.3.82.1 |
| 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_06-1.1 |