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Debian LinuxOperating system · Debian

CVE-2022-42310

MEDIUM · 5.5 CVSS v3.1 Published 2022-11-01
Fix available
A fix is available. Upgrade to 4.13.0 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Xenstore: Guests can create orphaned Xenstore nodes By creating multiple nodes inside a transaction resulting in an error, a malicious guest can create orphaned nodes in the Xenstore data base, as the cleanup after the error will not remove all nodes already created. When the transaction is committed after this situation, nodes without a valid parent can be made permanent in the data base.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Debian LinuxOperating system
Affected:= 11.0
FedoraOperating system
Affected:= 35= 36= 37
XenOperating system
Affected:>= 4.9.0, < 4.13.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 4.13.0 or later
Fixed in 4.13.0
Vendor patch xenbits.xen.org →
Recommended fix Moderate confidence

Xen 4.13.0 or later (or corresponding patched packages in Fedora/Debian)

  1. 1. Identify the Xen hypervisor version currently running: `xl info | grep xen_version` or `xm version`
  2. 2. For Xen hosts: Upgrade Xen to version 4.13.0 or later which contains the fix for this vulnerability
  3. 3. For Fedora systems (35, 36, 37): Update the xen package to the latest available version that includes the XSA-415 patch: `dnf update xen`
  4. 4. For Debian 11 systems: Update the xen packages to the latest security-patched version: `apt update && apt upgrade`
  5. 5. After upgrading, reboot the Xen host to load the new hypervisor
  6. 6. Verify the new Xen version is running: `xl info | grep xen_version`
  7. 7. For existing guests that may have created orphaned nodes, review and clean up Xenstore database if necessary
Caveat Upgrading Xen hypervisor requires host reboot and may require guest configuration adjustments; test in staging first

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-42310 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
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