{"id":"CVE-2022-33745","state":"PUBLISHED","title":"insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. T","description":"insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / value between old and new code positions. The now wrong use of the variable did lead to a wrong TLB flush condition, omitting flushes where such are necessary.","publishedAt":"2022-07-26T00:00:00.000Z","updatedAt":"2024-08-03T08:09:22.681Z","severity":null,"assigner":"XEN","products":["Xen xen"],"affected":[{"vendor":"Xen","product":"xen","versions":[{"version":"consult Xen advisory XSA-408","status":"unknown"}]}],"references":["https://xenbits.xenproject.org/xsa/advisory-408.txt","http://xenbits.xen.org/xsa/advisory-408.html","http://www.openwall.com/lists/oss-security/2022/07/26/2","http://www.openwall.com/lists/oss-security/2022/07/26/3","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HUFIMNGYP5VQAA6KE3T2I5GW6UP6F7BS/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MYI3OMJ7RIZNL3C6GUWNANNPEUUID6FM/","https://www.debian.org/security/2022/dsa-5272"],"weaknesses":[],"ingestedAt":"2026-10-29T19:50:12.412Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/33xxx/CVE-2022-33745.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2022-33745","state":"PUBLISHED","datePublished":"2022-07-26T00:00:00.000Z","dateUpdated":"2024-08-03T08:09:22.681Z","assignerShortName":"XEN","assignerOrgId":"23aa2041-22e1-471f-9209-9b7396fa234f","dateReserved":"2022-06-15T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / value between old and new code positions. The now wrong use of the variable did lead to a wrong TLB flush condition, omitting flushes where such are necessary."}],"affected":[{"vendor":"Xen","product":"xen","versions":[{"version":"consult Xen advisory XSA-408","status":"unknown"}]}],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-408.txt"},{"url":"http://xenbits.xen.org/xsa/advisory-408.html"},{"url":"http://www.openwall.com/lists/oss-security/2022/07/26/2","name":"[oss-security] 20220726 Xen Security Advisory 408 v2 (CVE-2022-33745) - insufficient TLB flush for x86 PV guests in shadow mode","tags":["mailing-list"]},{"url":"http://www.openwall.com/lists/oss-security/2022/07/26/3","name":"[oss-security] 20220726 Xen Security Advisory 408 v3 (CVE-2022-33745) - insufficient TLB flush for x86 PV guests in shadow mode","tags":["mailing-list"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HUFIMNGYP5VQAA6KE3T2I5GW6UP6F7BS/","name":"FEDORA-2022-4f7cd241e2","tags":["vendor-advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MYI3OMJ7RIZNL3C6GUWNANNPEUUID6FM/","name":"FEDORA-2022-a0d7a5eaf2","tags":["vendor-advisory"]},{"url":"https://www.debian.org/security/2022/dsa-5272","name":"DSA-5272","tags":["vendor-advisory"]}],"metrics":[{"other":{"type":"unknown","content":{"description":{"description_data":[{"lang":"eng","value":"The known (observed) impact would be a Denial of Service (DoS) affecting\nthe entire host, due to running out of memory.  Privilege escalation and\ninformation leaks cannot be ruled out."}]}}}}],"problemTypes":[{"descriptions":[{"type":"text","lang":"en","description":"unknown"}]}],"providerMetadata":{"shortName":"XEN","orgId":"23aa2041-22e1-471f-9209-9b7396fa234f","dateUpdated":"2022-11-07T00:00:00.000Z"},"credits":[{"lang":"en","value":"{'credit_data': {'description': {'description_data': [{'lang': 'eng', 'value': 'This issue was discovered by Charles Arnold of SUSE.'}]}}}"}]},"adp":[{"title":"CVE Program Container","references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-408.txt","tags":["x_transferred"]},{"url":"http://xenbits.xen.org/xsa/advisory-408.html","tags":["x_transferred"]},{"url":"http://www.openwall.com/lists/oss-security/2022/07/26/2","name":"[oss-security] 20220726 Xen Security Advisory 408 v2 (CVE-2022-33745) - insufficient TLB flush for x86 PV guests in shadow mode","tags":["mailing-list","x_transferred"]},{"url":"http://www.openwall.com/lists/oss-security/2022/07/26/3","name":"[oss-security] 20220726 Xen Security Advisory 408 v3 (CVE-2022-33745) - insufficient TLB flush for x86 PV guests in shadow mode","tags":["mailing-list","x_transferred"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HUFIMNGYP5VQAA6KE3T2I5GW6UP6F7BS/","name":"FEDORA-2022-4f7cd241e2","tags":["vendor-advisory","x_transferred"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MYI3OMJ7RIZNL3C6GUWNANNPEUUID6FM/","name":"FEDORA-2022-a0d7a5eaf2","tags":["vendor-advisory","x_transferred"]},{"url":"https://www.debian.org/security/2022/dsa-5272","name":"DSA-5272","tags":["vendor-advisory","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T08:09:22.681Z"}}]}}}