xen: With its original introduction, GNTTAB_cache_flush was made available uniformly
CVE-2026-102700 is fixed in xen on 1 platform, first by DEBIAN-CVE-2026-102700, released October 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.)
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| xen · Debian 12.15 (bookworm) | 4.17.7+13-g2445b30a44-0+deb12u1 | DEBIAN-CVE-2026-102700 | Oct 19, 2026 |
| xen · Debian 13.5 (trixie) | 4.20.4+39-gf1e1321c87-0+deb13u1 | DEBIAN-CVE-2026-102700 | Oct 19, 2026 |
| xen · Debian 14 | 4.20.4+39-gf1e1321c87-1 | DEBIAN-CVE-2026-102700 | Oct 19, 2026 |
| xen · sles 15.7 | 4.20.4_06-150700.3.49.2 | SUSE-SU-2026:4942-1 | Nov 7, 2026 |
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