[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.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://xenbits.xenproject.org/xsa/advisory-475.html Patch, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2025/10/21/1 Mailing List, Patch, Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-475.html Patch, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.5 · xenNVD modified 2026-10-19 13:10
Affected (CPE criteria) 1
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
References 3
- https://xenbits.xenproject.org/xsa/advisory-475.html Patch, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2025/10/21/1 Mailing List, Patch, Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-475.html Patch, Vendor Advisory