xen: [This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to...
CVE-2026-42490 is fixed in xen on 1 platform, first by SUSE-SU-2026:2329-1, released June 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.
[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] To create and manage guests, domctl operations are used by the control domain, a possible Xenstore domain, or by a domain controlling a particular guest. Some of these operations may not be executed in parallel, so a system-wide lock is used. The way that lock is acquired is, however, not providing any fairness. This is CVE-2026-42489. Furthermore, with XSM/Flask in use, the lock acquire will, for some operations, occur ahead of any permission checking. This is CVE-2026-42490.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| xen · Debian 12.15 (bookworm) | 4.17.7-0+deb12u1 | DEBIAN-CVE-2026-42490 | Jun 18, 2026 |
| xen · Debian 13.5 (trixie) | 4.20.3+127-gc42374a105-0+deb13u1 | DEBIAN-CVE-2026-42490 | Jun 18, 2026 |
| xen · Debian 14 | 4.20.3+127-gc42374a105-1 | DEBIAN-CVE-2026-42490 | Jun 18, 2026 |
| xen · sles 15.6 | 4.18.5_18-150600.3.50.1 | SUSE-SU-2026:2329-1 | Jun 10, 2026 |
| xen · sles 15.7 | 4.20.3_06-150700.3.41.1 | SUSE-SU-2026:2364-1 | Jun 11, 2026 |
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