CVE-2026-62428 — grant-table: type confusion in grant-copy

Description (CNA)

When grant-copy operations are processed, the respective grant may or may not already be in use by another operation (a mapping or another copy). For all copy operations the referenced guest frame is looked up. When another operation is already active for the grant (the grant is "pinned"), what is being supplied back to actually carry out permission checks and copy operation may not be consistent: The permission check may be carried out on a page different from the one involved in the copy.

Affected (CNA)

Vendor / product	Versions
Xen / Xen	unknown consult Xen advisory XSA-500

CWE

No CWE identifiers supplied.

References

https://xenbits.xenproject.org/xsa/advisory-500.html

ADP enrichment

CVE

No English description supplied.

http://xenbits.xen.org/xsa/advisory-500.html
http://www.openwall.com/lists/oss-security/2026/07/28/16

CISA-ADP

No English description supplied.

No references supplied.