Xen Security Advisory 517 v2 (CVE-2026-79610) - grant-table: double version change race

As cited

Copy frozen at 2026-10-13 15:04 UTC (site build).

vulnerabilities

Xen Security Advisory 517 v2 (CVE-2026-79610) - grant-table: double version change race

Xen released Security Advisory 517 version 2, addressing CVE-2026-79610, a grant-table race condition involving double version changes. The vulnerability stems from a gap in prior fix XSA-501 where v2 to v1 to v2 transitions create an additional security impact not previously covered.

Why it matters: Xen hypervisor operators must apply this patch to prevent privilege escalation or denial of service through grant table version manipulation in guest-to-guest or guest-to-host scenarios.

Source published

2026-10-13 12:58 UTC

First seen by Cybersecurity Tracker

2026-10-13 13:57 UTC