{"id":"CVE-2015-2756","details":"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.","modified":"2026-02-04T02:55:05.857274Z","published":"2015-04-01T14:59:08Z","related":["MGASA-2016-0098","SUSE-SU-2015:0701-1","SUSE-SU-2015:0745-1","SUSE-SU-2015:0746-1","SUSE-SU-2015:0747-1"],"references":[{"type":"ADVISORY","url":"http://www.debian.org/security/2015/dsa-3259"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-2608-1"},{"type":"ADVISORY","url":"http://xenbits.xen.org/xsa/advisory-126.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/201504-04"},{"type":"WEB","url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-April/154574.html"},{"type":"WEB","url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-April/154579.html"},{"type":"WEB","url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155198.html"},{"type":"WEB","url":"http://lists.nongnu.org/archive/html/qemu-devel/2015-03/msg06179.html"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00014.html"},{"type":"WEB","url":"http://support.citrix.com/article/CTX201145"},{"type":"WEB","url":"http://www.securityfocus.com/bid/72577"},{"type":"WEB","url":"http://www.securitytracker.com/id/1031998"},{"type":"WEB","url":"https://support.citrix.com/article/CTX206006"}],"schema_version":"1.7.3"}