GHSA-5jmq-x85f-gprc
GitHub Security Advisory
⚠ Unreviewed
MODERATE
Has CVE
Advisory Details
A PV guest could DoS Xen while unmapping a grant To address XSA-380, reference counting was introduced for grant mappings for the case where a PV guest would have the IOMMU enabled. PV guests can request two forms of mappings. When both are in use for any individual mapping, unmapping of such a mapping can be requested in two steps. The reference count for such a mapping would then mistakenly be decremented twice. Underflow of the counters gets detected, resulting in the triggering of a hypervisor bug check.
Related CVEs
Key Information
5.0
/10
Dataset
Last updated: September 14, 2025 6:31 AM
Data from GitHub Advisory Database. This information is provided for research and educational purposes.