xen: [This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to...
CVE-2026-102702 is fixed in xen on 1 platform, first by DEBIAN-CVE-2026-102702, released October 19, 2026. It is not reported as exploited. Patch Radar priority: High.
[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] 1) XSA-437 (CVE-2023-34321) addressed issues with overflows in calculations involved in guests flushing caches through GNTTABOP_cache_flush. Unfortunately the fix there introduced a calculation which may underflow, resulting in a loop which would - at least on 64-bit Arm - take excessively long, and which would likely eventually crash the hypervisor. This is CVE-2026-102699. 2) GNTTABOP_cache_flush may be issued on memory mapped from another domain using the grant table interface. However there was no restriction to disallow the use of invalidate-without-clean against read-only grant mappings, which may corrupt the granted memory. This is CVE-2026-102702.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| xen · Debian 12.15 (bookworm) | 4.17.7+13-g2445b30a44-0+deb12u1 | DEBIAN-CVE-2026-102702 | Oct 19, 2026 |
| xen · Debian 13.5 (trixie) | 4.20.4+39-gf1e1321c87-0+deb13u1 | DEBIAN-CVE-2026-102702 | Oct 19, 2026 |
| xen · Debian 14 | 4.20.4+39-gf1e1321c87-1 | DEBIAN-CVE-2026-102702 | Oct 19, 2026 |
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