Is CVE-2023-34322 in the CISA KEV catalog?

No. CVE-2023-34322 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-34322?

CVE-2023-34322 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2023-34322?

CVE-2023-34322 has an EPSS score of 0.23% (14th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-34322?

Upgrade xen on debian 12 to 4.17.2+76-ge1f9cb16e2-1~deb12u1 or later.

CVE & CISA-KEV Catalog

CVE-2023-34322

HIGH

7.8

CVSS v3

NVD

Description

For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. Since Xen itself needs to be mapped when PV guests run, Xen and shadowed PV guests run directly the respective shadow page tables. For 64-bit PV guests this means running on the shadow of the guest root page table. In the course of dealing with shortage of memory in the shadow pool associated with a domain, shadows of page tables may be torn down. This tearing down may include the shadow root page table that the CPU in question is presently running on. While a precaution exists to supposedly prevent the tearing down of the underlying live page table, the time window covered by that precaution isn't large enough.

CWE-273

How to fix

Remediation Available

xenDebian

Fixed in:4.17.2+76-ge1f9cb16e2-1~deb12u1CVE-2023-34322

Fixed in:4.17.2+55-g0b56bed864-1CVE-2023-34322

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.23%probability of exploitation in 30 days

14thpercentile

Low risk: more likely to be exploited than 14% of all known CVEs.

References

Vendor Advisory1

xenbits.xenproject.org

Other references1

xenbits.xen.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-04.