gnttab: cache-flush handling may cause page reference leak

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-102700
StatePUBLISHED
AssignerXEN
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-13 16:17:09 UTC
Updated2026-10-14 16:10:14 UTC
DescriptionWith 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.)

Risk And Classification

EPSS: 0.001840000 probability, percentile 0.074540000 (date 2026-10-14)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Xen Xen unknown consult Xen advisory XSA-520 Not specified

References

ReferenceSourceLinkTags
xenbits.xenproject.org/xsa/advisory-520.html [email protected] xenbits.xenproject.org
xenbits.xen.org/xsa/advisory-520.html af854a3a-2127-422b-91ae-364da2661108 xenbits.xen.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: This issue was discovered independently by Andrew Cooper of Citrix and Yehyeong Lee. (en)

Additional Advisory Data

Workarounds

CNA: There is no known mitigation.

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