CVE-2026-62426
Fixed in a distro release EPSS <1%CVSS 8.8
[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] To manage the system, sysctl and platform operations are used by the control domain or a possible Xenstore domain. Some of these operations may not be executed in parallel, so a system-wide lock each is used. The way those locks are acquired is, however, not providing any fairness. Furthermore, with XSM/Flask in use, the lock acquire will, for some operations, occur ahead of any permission checking. The sysctl issue is CVE-2026-62426. The platform-op issue is CVE-2026-62427.
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 |