CVE-2022-33745

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.

• http://www.openwall.com/lists/oss-security/2022/07/26/2Mailing List, Patch, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2022/07/26/3Mailing List, Patch, Third Party Advisory
• http://xenbits.xen.org/xsa/advisory-408.htmlPatch, Vendor Advisory
• 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-5272Third Party Advisory
• https://xenbits.xenproject.org/xsa/advisory-408.txtVendor Advisory
• http://www.openwall.com/lists/oss-security/2022/07/26/2Mailing List, Patch, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2022/07/26/3Mailing List, Patch, Third Party Advisory
• http://xenbits.xen.org/xsa/advisory-408.htmlPatch, Vendor Advisory
• 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-5272Third Party Advisory
• https://xenbits.xenproject.org/xsa/advisory-408.txtVendor Advisory

Published

Jul 26, 2022

Last Modified

Jun 17, 2026

Status

Modified

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