CVE-2026-79610 — grant-table: double version change race

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Xen / Xen	unknown consult Xen advisory XSA-517

CWE

No CWE identifiers supplied.

References

https://xenbits.xenproject.org/xsa/advisory-517.html

ADP enrichment

CVE

No English description supplied.

http://xenbits.xen.org/xsa/advisory-517.html
http://www.openwall.com/lists/oss-security/2026/10/13/6

CISA-ADP

No English description supplied.

No references supplied.