Log in Start free

Vulnerability · Published Jul 26, 2022 · Assigned by XEN

CVE-2022-33745

High 8.8

In plain English

A high-severity security flaw in xen from Xen. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)8.8High
Exploit odds (30 days)0.3%top 77.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20xen4.16.1-r6ALPINE-CVE-2022-33745
Alpine:v3.21xen4.16.1-r6ALPINE-CVE-2022-33745
Alpine:v3.22xen4.16.1-r6ALPINE-CVE-2022-33745
Alpine:v3.23xen4.16.1-r6ALPINE-CVE-2022-33745
Alpine:v3.24xen4.16.1-r6ALPINE-CVE-2022-33745
Debian:12xen4.16.2-1DEBIAN-CVE-2022-33745
Debian:13xen4.16.2-1DEBIAN-CVE-2022-33745
Debian:14xen4.16.2-1DEBIAN-CVE-2022-33745
Ubuntu:22.04:LTSxenno fix listedUBUNTU-CVE-2022-33745
Ubuntu:24.04:LTSxenno fix listedUBUNTU-CVE-2022-33745
Ubuntu:25.10xenno fix listedUBUNTU-CVE-2022-33745
Ubuntu:26.04:LTSxenno fix listedUBUNTU-CVE-2022-33745
Ubuntu:26.10xenno fix listedUBUNTU-CVE-2022-33745

Affected products (as reported)

VendorProductVersions
Xen xen see references

References