CVE-2022-33745 (GCVE-0-2022-33745)

Vulnerability from cvelistv5 – Published: 2022-07-26 00:00 – Updated: 2024-08-03 08:09
VLAI
Summary
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.
Severity
No CVSS data available.
CWE
  • unknown
Assigner
XEN
References
Impacted products
Vendor Product Version
Xen xen Unknown: consult Xen advisory XSA-408
Create a notification for this product.
Credits
{'credit_data': {'description': {'description_data': [{'lang': 'eng', 'value': 'This issue was discovered by Charles Arnold of SUSE.'}]}}}
Show details on NVD website
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    "redhat_vex": {
      "current_release_date": "2025-11-21T15:51:26+00:00",
      "cve": "CVE-2022-33745",
      "id": "CVE-2022-33745",
      "initial_release_date": "2022-07-26T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "xen: insufficient TLB flush for x86 PV guests in shadow mode",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-33745.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-07-25T17:24:19Z",
      "cve": "CVE-2022-33745",
      "id": "CVE-2022-33745",
      "initial_release_date": "2023-02-15T03:25:05Z",
      "product_status:known_affected": "231",
      "product_status:recommended": "548",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-33745",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-33745.json",
      "version": "42"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.