{"api_version":"1","generated_at":"2026-04-22T23:53:15+00:00","cve":"CVE-2022-26363","urls":{"html":"https://cve.report/CVE-2022-26363","api":"https://cve.report/api/cve/CVE-2022-26363.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2022-26363","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2022-26363"},"summary":{"title":"CVE-2022-26363","description":"x86 pv: Insufficient care with non-coherent mappings T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] 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. 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Therefore, we believe that Xen running on Intel\nIvyBridge or later CPUs is not impacted by the vulnerability."}]}}},"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: Insufficient care with non-coherent mappings T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] 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, Xen's safety logic doesn't account for CPU-induced cache non-coherency; cases where the CPU can cause the content of the cache to be different to the content in main memory. 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