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.

CVSS v3.0 8.8 HIGH

8.8^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 2.0 / Impact : 6.0

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 Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/07/26/3	Mailing List Patch Third Party Advisory
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

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Configurations

Configuration 1 (hide)

cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*

Configuration 2 (hide)

OR	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 06:15

Updated : 2022-12-12 12:45

NVD link : CVE-2022-33745

Mitre link : CVE-2022-33745

JSON object : View

CWE

NVD-CWE-noinfo

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Products Affected

debian

debian_linux

xen

xen

fedoraproject

fedora

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