CVE-2026-102700 — gnttab: cache-flush handling may cause page reference leak

Description (CNA)

With its original introduction, GNTTAB_cache_flush was made available uniformly. XSA-232 (CVE-2017-14318) then covered an omitted NULL pointer check, yet the addition of that check failed to adjust the subsequent error path. That error path fails to drop a page reference in case the specified page is owned by a special system domain (DOM_IO and DOM_COW are system domains which can have memory pages assigned to them.)

Affected (CNA)

Vendor / product	Versions
Xen / Xen	unknown consult Xen advisory XSA-520

CWE

No CWE identifiers supplied.

References

https://xenbits.xenproject.org/xsa/advisory-520.html

ADP enrichment

CVE

No English description supplied.

http://xenbits.xen.org/xsa/advisory-520.html

CISA-ADP

No English description supplied.

No references supplied.