{"id":"CVE-2012-3495","aliases":["DEBIAN-CVE-2012-3495","EUVD-2012-3451","GHSA-w2q9-w27j-m384"],"status":"published","title":"The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2...","description":"The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.","severity":{"version":"2.0","score":6.1,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:C","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00439,"percentile":0.38387,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2012-11-23T20:00:00Z","modified":"2026-10-23T17:47:49Z","fixes":[{"ecosystem":"Debian:12","package":"xen","fixed_in":["4.1.3-2"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"xen","fixed_in":["4.1.3-2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"xen","fixed_in":["4.1.3-2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.3-2"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.3-2"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.3-2"}]}]}],"products":[{"vendor":"citrix","product":"xenserver"},{"vendor":"xen","product":"xen"}],"references":[{"url":"http://secunia.com/advisories/55082","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"http://xenbits.xen.org/hg/xen-4.1-testing.hg/rev/6779ddca8593","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://lists.xen.org/archives/html/xen-announce/2012-09/msg00001.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"http://secunia.com/advisories/51413","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"http://security.gentoo.org/glsa/glsa-201309-24.xml","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","advisory"]},{"url":"http://wiki.xen.org/wiki/Security_Announcements#XSA-13_hypercall_physdev_get_free_pirq_vulnerability","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"http://www.securityfocus.com/bid/55406","tags":["vdb-entry","x_refsource_BID","x_transferred","web"]},{"url":"http://www.securitytracker.com/id?1027480","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","web"]},{"url":"https://security.gentoo.org/glsa/201604-03","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","advisory"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00003.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"http://support.citrix.com/article/CTX134708","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://www.openwall.com/lists/oss-security/2012/09/05/6","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00017.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2012-3495"},{"url":"https://github.com/advisories/GHSA-w2q9-w27j-m384"},{"url":"https://security-tracker.debian.org/tracker/CVE-2012-3495","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2012-3495","description":"The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.","status":"published","published":"2012-11-23T20:00:00Z","modified":"2024-08-06T20:05:12.705Z","updated_at":"2026-11-02T14:34:50.615647Z"}],"euvd":[{"id":"EUVD-2012-3451","description":"The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.","status":"published","published":"2012-11-23T20:00:00Z","modified":"2024-08-06T20:05:12Z","updated_at":"2026-11-03T01:56:10.882899Z"}],"ghsa":[{"id":"GHSA-w2q9-w27j-m384","title":"The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2...","description":"The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.","status":"published","published":"2022-05-17T02:39:20Z","modified":"2023-01-27T05:05:36Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:42:43.937226Z"}],"nvd":[{"id":"CVE-2012-3495","description":"The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.","status":"published","published":"2012-11-23T20:55:03.15Z","modified":"2026-06-16T23:43:20.333Z","cvss":[{"version":"2.0","score":6.1,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:C","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:02:16.536025Z"}],"osv":[{"id":"CVE-2012-3495","description":"The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.","status":"published","published":"2012-11-23T20:55:03Z","modified":"2026-04-10T03:43:12.657327Z","updated_at":"2026-11-02T15:43:58.537032Z"},{"id":"DEBIAN-CVE-2012-3495","description":"The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.","status":"published","published":"2012-11-23T20:55:03.15Z","modified":"2026-10-23T17:47:49.919129023Z","updated_at":"2026-11-02T15:45:24.92418Z"}]}}