CVE - CVE-2022-33745

CVE-ID
CVE-2022-33745	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:http://xenbits.xen.org/xsa/advisory-408.html DEBIAN:DSA-5272 URL:https://www.debian.org/security/2022/dsa-5272 FEDORA:FEDORA-2022-4f7cd241e2 URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HUFIMNGYP5VQAA6KE3T2I5GW6UP6F7BS/ FEDORA:FEDORA-2022-a0d7a5eaf2 URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MYI3OMJ7RIZNL3C6GUWNANNPEUUID6FM/ MISC:https://xenbits.xenproject.org/xsa/advisory-408.txt URL:https://xenbits.xenproject.org/xsa/advisory-408.txt MLIST:[oss-security] 20220726 Xen Security Advisory 408 v2 (CVE-2022-33745) - insufficient TLB flush for x86 PV guests in shadow mode URL:http://www.openwall.com/lists/oss-security/2022/07/26/2 MLIST:[oss-security] 20220726 Xen Security Advisory 408 v3 (CVE-2022-33745) - insufficient TLB flush for x86 PV guests in shadow mode URL:http://www.openwall.com/lists/oss-security/2022/07/26/3
Assigning CNA
Xen Project
Date Record Created
20220615	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20220615)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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