CVE-2025-58148

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Some Viridian hypercalls can specify a mask of vCPU IDs as an input, in one of three formats. Xen has boundary checking bugs with all three formats, which can cause out-of-bounds reads and writes while processing the inputs. * CVE-2025-58147. Hypercalls using the HV_VP_SET Sparse format can cause vpmask_set() to write out of bounds when converting the bitmap to Xen's format. * CVE-2025-58148. Hypercalls using any input format can cause send_ipi() to read d->vcpu[] out-of-bounds, and operate on a wild vCPU pointer.

• CWE-125
• CWE-787

• https://xenbits.xenproject.org/xsa/advisory-475.htmlPatch, Vendor Advisory
• http://www.openwall.com/lists/oss-security/2025/10/21/1Mailing List, Patch, Third Party Advisory
• http://xenbits.xen.org/xsa/advisory-475.htmlPatch, Vendor Advisory

Published

Oct 31, 2025

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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