Is CVE-2022-42309 in the CISA KEV catalog?

No. CVE-2022-42309 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-42309?

CVE-2022-42309 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2022-42309?

CVE-2022-42309 has an EPSS score of 0.27% (19th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-42309?

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

CVE & CISA-KEV Catalog

CVE-2022-42309

HIGH

8.8

CVSS v3

NVD

Description

Xenstore: Guests can crash xenstored Due to a bug in the fix of XSA-115 a malicious guest can cause xenstored to use a wrong pointer during node creation in an error path, resulting in a crash of xenstored or a memory corruption in xenstored causing further damage. Entering the error path can be controlled by the guest e.g. by exceeding the quota value of maximum nodes per domain.

CWE-763

How to fix

Remediation Available

xenDebian

Fixed in:4.14.5+86-g1c354767d5-1CVE-2022-42309

Fixed in:4.16.2+90-g0d39a6d1ae-1CVE-2022-42309

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

0.27%probability of exploitation in 30 days

19thpercentile

Low risk: more likely to be exploited than 19% of all known CVEs.

References

Patch2

Third-Party Advisory2

Other references4

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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.