{"containers":{"cna":{"affected":[{"product":"xen","vendor":"Xen","versions":[{"status":"unknown","version":"consult Xen advisory XSA-401"}]}],"credits":[{"lang":"en","value":"{'credit_data': {'description': {'description_data': [{'lang': 'eng', 'value': 'This issue was discovered by Jann Horn of Google Project Zero.'}]}}}"}],"descriptions":[{"lang":"en","value":"x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited."}],"metrics":[{"other":{"content":{"description":{"description_data":[{"lang":"eng","value":"Malicious x86 PV guest administrators may be able to escalate privilege\nso as to control the whole system."}]}},"type":"unknown"}}],"problemTypes":[{"descriptions":[{"description":"unknown","lang":"en","type":"text"}]}],"providerMetadata":{"dateUpdated":"2022-08-14T20:11:19.000Z","orgId":"23aa2041-22e1-471f-9209-9b7396fa234f","shortName":"XEN"},"references":[{"tags":["x_refsource_MISC"],"url":"https://xenbits.xenproject.org/xsa/advisory-401.txt"},{"tags":["x_refsource_CONFIRM"],"url":"http://xenbits.xen.org/xsa/advisory-401.html"},{"name":"[oss-security] 20220609 Xen Security Advisory 401 v2 (CVE-2022-26362) - x86 pv: Race condition in typeref acquisition","tags":["mailing-list","x_refsource_MLIST"],"url":"http://www.openwall.com/lists/oss-security/2022/06/09/3"},{"name":"FEDORA-2022-0142d562ca","tags":["vendor-advisory","x_refsource_FEDORA"],"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OH65U6FTTB5MLH5A6Q3TW7KVCGOG4MYI/"},{"tags":["x_refsource_MISC"],"url":"http://packetstormsecurity.com/files/167718/Xen-TLB-Flush-Bypass.html"},{"name":"DSA-5184","tags":["vendor-advisory","x_refsource_DEBIAN"],"url":"https://www.debian.org/security/2022/dsa-5184"},{"name":"FEDORA-2022-2c9f8224f8","tags":["vendor-advisory","x_refsource_FEDORA"],"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/"},{"name":"GLSA-202208-23","tags":["vendor-advisory","x_refsource_GENTOO"],"url":"https://security.gentoo.org/glsa/202208-23"}],"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"security@xen.org","ID":"CVE-2022-26362","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"xen","version":{"version_data":[{"version_affected":"?","version_value":"consult Xen advisory XSA-401"}]}}]},"vendor_name":"Xen"}]}},"configuration":{"configuration_data":{"description":{"description_data":[{"lang":"eng","value":"All versions of Xen are vulnerable.\n\nOnly x86 PV guests can trigger this vulnerability.\n\nTo exploit the vulnerability, there needs to be an undue delay at just\nthe wrong moment in _get_page_type().  The degree to which an x86 PV\nguest can practically control this race condition is unknown."}]}}},"credit":{"credit_data":{"description":{"description_data":[{"lang":"eng","value":"This issue was discovered by Jann Horn of Google Project Zero."}]}}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited."}]},"impact":{"impact_data":{"description":{"description_data":[{"lang":"eng","value":"Malicious x86 PV guest administrators may be able to escalate privilege\nso as to control the whole system."}]}}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"unknown"}]}]},"references":{"reference_data":[{"name":"https://xenbits.xenproject.org/xsa/advisory-401.txt","refsource":"MISC","url":"https://xenbits.xenproject.org/xsa/advisory-401.txt"},{"name":"http://xenbits.xen.org/xsa/advisory-401.html","refsource":"CONFIRM","url":"http://xenbits.xen.org/xsa/advisory-401.html"},{"name":"[oss-security] 20220609 Xen Security Advisory 401 v2 (CVE-2022-26362) - x86 pv: Race condition in typeref acquisition","refsource":"MLIST","url":"http://www.openwall.com/lists/oss-security/2022/06/09/3"},{"name":"FEDORA-2022-0142d562ca","refsource":"FEDORA","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OH65U6FTTB5MLH5A6Q3TW7KVCGOG4MYI/"},{"name":"http://packetstormsecurity.com/files/167718/Xen-TLB-Flush-Bypass.html","refsource":"MISC","url":"http://packetstormsecurity.com/files/167718/Xen-TLB-Flush-Bypass.html"},{"name":"DSA-5184","refsource":"DEBIAN","url":"https://www.debian.org/security/2022/dsa-5184"},{"name":"FEDORA-2022-2c9f8224f8","refsource":"FEDORA","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/"},{"name":"GLSA-202208-23","refsource":"GENTOO","url":"https://security.gentoo.org/glsa/202208-23"}]},"workaround":{"workaround_data":{"description":{"description_data":[{"lang":"eng","value":"Not running x86 PV guests will avoid the vulnerability."}]}}}}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-03T05:03:32.792Z"},"title":"CVE Program Container","references":[{"tags":["x_refsource_MISC","x_transferred"],"url":"https://xenbits.xenproject.org/xsa/advisory-401.txt"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"http://xenbits.xen.org/xsa/advisory-401.html"},{"name":"[oss-security] 20220609 Xen Security Advisory 401 v2 (CVE-2022-26362) - x86 pv: Race condition in typeref acquisition","tags":["mailing-list","x_refsource_MLIST","x_transferred"],"url":"http://www.openwall.com/lists/oss-security/2022/06/09/3"},{"name":"FEDORA-2022-0142d562ca","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred"],"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OH65U6FTTB5MLH5A6Q3TW7KVCGOG4MYI/"},{"tags":["x_refsource_MISC","x_transferred"],"url":"http://packetstormsecurity.com/files/167718/Xen-TLB-Flush-Bypass.html"},{"name":"DSA-5184","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred"],"url":"https://www.debian.org/security/2022/dsa-5184"},{"name":"FEDORA-2022-2c9f8224f8","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred"],"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/"},{"name":"GLSA-202208-23","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred"],"url":"https://security.gentoo.org/glsa/202208-23"}]}]},"cveMetadata":{"assignerOrgId":"23aa2041-22e1-471f-9209-9b7396fa234f","assignerShortName":"XEN","cveId":"CVE-2022-26362","datePublished":"2022-06-09T12:50:19.000Z","dateReserved":"2022-03-02T00:00:00.000Z","dateUpdated":"2024-08-03T05:03:32.792Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"}