{"cve":"CVE-2015-2756","nvd":{"published":"2015-04-01T14:59:08.757","modified":"2026-06-17T00:24:41.803","status":"Modified","description":"QEMU, as used in Xen 3.3.x through 4.5.x, does not properly restrict access to PCI command registers, which might allow local HVM guest users to cause a denial of service (non-maskable interrupt and host crash) by disabling the (1) memory or (2) I/O decoding for a PCI Express device and then accessing the device, which triggers an Unsupported Request (UR) response.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-264"],"references":["http://lists.fedoraproject.org/pipermail/package-announce/2015-April/154574.html","http://lists.fedoraproject.org/pipermail/package-announce/2015-April/154579.html","http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155198.html","http://lists.nongnu.org/archive/html/qemu-devel/2015-03/msg06179.html","http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00014.html"],"products":["canonical:ubuntu_linux","debian:debian_linux","fedoraproject:fedora","xen:xen"],"source":"nvd","synced_at":"2026-10-19T20:35:35.528235705+00:00"},"epss":{"cve":"CVE-2015-2756","score":0.0045,"percentile":0.39127,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}