Security readout for executives and security teams
A malicious Xen guest can abuse Xenstore transactions to create unlimited Xenstore nodes because failed transaction cleanup does not update accounting correctly. The business impact is host availability: affected Xen hosts may suffer resource exhaustion or denial of service. Exposure is most relevant for organizations running Xen virtualization, especially shared or multi-tenant hosts with guest domains they do not fully trust. Exact affected versions should be confirmed against Xen Security Advisory XSA-421 and distribution advisories. Treat this as a moderate availability risk for Xen infrastructure, with higher urgency on shared hosting or cloud-like environments. Patch in the normal vulnerability cycle, but accelerate where untrusted guests share hosts. Mitigation focus: Consult Xen Security Advisory XSA-421 for affected versions and fixed releases.; Apply Xen or distribution security updates from Debian, Fedora, Gentoo, or your vendor.; Prioritize hosts running untrusted or multi-tenant guest workloads..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-401: Exact CWE lookup
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Open ATT&CK lookupCVE-2022-42326 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://xenbits.xenproject.org/xsa/advisory-421.txtCVE reference
- DSA-5272CVE reference · vendor-advisory
- FEDORA-2022-07438e12dfCVE reference · vendor-advisory
- FEDORA-2022-99af00f60eCVE reference · vendor-advisory
- FEDORA-2022-9f51d13fa3CVE reference · vendor-advisory
- GLSA-202402-07CVE reference · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Release of Memory after Effective Lifetime
Missing Release of Memory after Effective Lifetime represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.