What is CVE-2022-42330?

CVE-2022-42330 is a high-severity vulnerability in Xen. CVSS score: 7.5/10. Published 2023-01-26.

How severe is CVE-2022-42330?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2022-42330 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Xen

CVE-2022-42330

Guests can cause Xenstore crash via soft reset When a guest issues a "Soft Reset" (e.g. for performing a kexec) the libxl based Xen toolstack will normally perform a XS_RELEASE Xenstore operation. Due to a bug in xenstored this can result in a crash of xenstored. Any other use of XS_RELEASE will have the same impact.

Published 2023-01-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.014 (70.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Xen — versions consult Xen advisory XSA-425, 4.17.0

Public proof-of-concept exploits

karimhabush/cyberowl

References

xenbits.xenproject.org/xsa/advisory-425.txt (Vendor Advisory)
security.gentoo.org/glsa/202402-07 (vendor-advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2022-42330?: CVE-2022-42330 is a high-severity vulnerability in Xen. CVSS score: 7.5/10. Published 2023-01-26.
How severe is CVE-2022-42330?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2022-42330 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.