CVE-2022-42309

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-11-01. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

November 1, 2022

Last Modified

November 21, 2024

Advisory Details (7)

Auto-updated Jul 26, 2026
No patch confirmed yet.
generic

XSA-414 - Xen Security Advisories

http://xenbits.xen.org/xsa/advisory-414.html
generic

oss-security - Xen Security Advisory 414 v2 (CVE-2022-42309) - Xenstore: Guests can crash xenstored

http://www.openwall.com/lists/oss-security/2022/11/01/4
generic

[SECURITY] [DSA 5272-1] xen security update

https://www.debian.org/security/2022/dsa-5272
generic

Xen: Multiple Vulnerabilities (GLSA 202402-07) — Gentoo security

https://security.gentoo.org/glsa/202402-07
generic

[SECURITY] Fedora 36 Update: xen-4.16.2-3.fc36 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/
generic

[SECURITY] Fedora 35 Update: xen-4.15.3-7.fc35 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZVXG7OOOXCX6VIPEMLFDPIPUTFAYWPE/
generic

[SECURITY] Fedora 37 Update: xen-4.16.2-4.fc37 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 42× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 104 total refreshes for this CVE.

  1. 2026-07-26 14:52 UTCEPSS rescore
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  3. 2026-07-25 14:15 UTCEPSS rescore
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  6. 2026-07-23 02:14 UTCEG score recompute
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  44. 2026-06-11 03:39 UTCOSV refresh
  45. 2026-06-10 22:17 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2022-42309?
CVE-2022-42309 is a high vulnerability published on November 1, 2022. 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…
When was CVE-2022-42309 disclosed?
CVE-2022-42309 was first published in the National Vulnerability Database on November 1, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-42309 actively exploited?
CVE-2022-42309 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 80.7% of all scored CVEs.
What is the CVSS score of CVE-2022-42309?
CVE-2022-42309 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2022-42309?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-42309, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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