Arm: multiple issues with GNTTABOP_cache_flush
[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.
CVE-2026-102699
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-102699
Xen
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Xen",
"product": "Xen",
"versions": [
{
"status": "unknown",
"version": "consult Xen advisory XSA-519"
}
],
"defaultStatus": "unknown"
}
]- Related CVEs
- CVE-2026-102699
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #42413 · Revision 1
- Added to Heist Feed
- Publisher date