Is CVE-2022-33745 in the CISA KEV catalog?

No. CVE-2022-33745 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-33745?

CVE-2022-33745 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2022-33745?

CVE-2022-33745 has an EPSS score of 0.29% (21th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-33745?

Upgrade xen on debian 11 to 4.14.5+86-g1c354767d5-1 or later.

CVE & CISA-KEV Catalog

CVE-2022-33745

HIGH

8.8

CVSS v3

NVD

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.

How to fix

Remediation Available

xenDebian

Fixed in:4.14.5+86-g1c354767d5-1CVE-2022-33745

Fixed in:4.16.2-1CVE-2022-33745

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

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.29%probability of exploitation in 30 days

21stpercentile

Low risk: more likely to be exploited than 21% of all known CVEs.

References

Patch3

Vendor Advisory1

xenbits.xenproject.org

Third-Party Advisory1

debian.org

Other references2

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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 2024-11-21.