CVE-2026-102702
[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.
- Score
- CVSS 3.1 7.5 High
- Status
- Awaiting Analysis - security@xen.org
- Published
- 2026-10-13
- Last modified
- 2026-10-20
- Weaknesses
- CWE-191
Affected products
References
- https://xenbits.xenproject.org/xsa/advisory-519.html
