CVE-2026-102702 (GCVE-0-2026-102702)

Vulnerability from cvelistv5 – Published: 2026-10-13 15:45 – Updated: 2026-10-20 17:28
VLAI
Title
Arm: multiple issues with GNTTABOP_cache_flush
Summary
[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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-20 17:27 UTC
CWE
  • CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
XEN CNA under the mitre root
CNA scorecard D 56/100 over 48 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Xen Xen Unknown: consult Xen advisory XSA-519
guessed Create a notification for this product.
Date Public
2026-10-13 12:00
Credits
CVE-2026-102699 was discovered by Leonid Komarianskyi of EPAM. It was later independently reported by Ayan Kumar Halder of AMD. CVE-2026-102702 was found by the security team while looking at the surrounding code.
Show details on NVD website
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