VULNERABILITY INTELLIGENCE
CVE-2022-33745
CVSS score8.8 HIGH
EPSS probability0.30%
CISA KEVNot currently listed
Published2022-07-26
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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.
Primary references
- security@xen.org — Mailing List, Patch, Third Party Advisory
- security@xen.org — Mailing List, Patch, Third Party Advisory
- security@xen.org — Patch, Vendor Advisory
- security@xen.org
- security@xen.org
- security@xen.org — Third Party Advisory
- security@xen.org — Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Patch, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Patch, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Patch, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108