CVE Vulnerability

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.

8.8 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 2 / Impact : 6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References
Link Resource
https://xenbits.xenproject.org/xsa/advisory-408.txt Vendor Advisory
http://xenbits.xen.org/xsa/advisory-408.html Patch Vendor Advisory
http://www.openwall.com/lists/oss-security/2022/07/26/2 Mailing List Patch
http://www.openwall.com/lists/oss-security/2022/07/26/3 Mailing List Patch
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HUFIMNGYP5VQAA6KE3T2I5GW6UP6F7BS/ Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MYI3OMJ7RIZNL3C6GUWNANNPEUUID6FM/ Mailing List Third Party Advisory
https://www.debian.org/security/2022/dsa-5272 Third Party Advisory
Configurations

Configuration 1

cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
Information

Published : 2022-07-26 01:15

Updated : 2022-12-12 08:45

NVD link : CVE-2022-33745

Mitre link : CVE-2022-33745

Products Affected
No products.
CWE
NVD-CWE-noinfo