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CVE-2026-102699

7.5 high SSVC exploitation: none Published
NVD · CVE.org

[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.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 4

  1. StatusAwaiting Analysis → PublishedNVD modified 2026-10-20 17:30
  2. CwesCWE-191NVD modified 2026-10-20 18:17
  3. CVSS7.5 (v3.1, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)NVD modified 2026-10-20 18:17
  4. First seenunscoredNVD modified 2026-10-14 16:10

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 1