CVE-2026-62437

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-09-08. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

When guests are terminated, various pieces of cleanup need carrying out. The cleaning up of PCI devices which were assigned to guests, and the associated removal of tracking structures for IRQs used by the devices occurs relatively early in the process. Unfortunately after that point the guest about to be terminated could cause its device model (DM) to re-establish such tracking structures, by having it bind one or more IRQs anew. While some of those tracking structures would still be cleaned up later on, at least one would not be.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

September 8, 2026

Last Modified

September 10, 2026

Advisory Details (1)

Auto-updated Sep 10, 2026
No patch confirmed yet.
generic

XSA-509 - Xen Security Advisories

https://xenbits.xenproject.org/xsa/advisory-509.html

Vendor Advisories for CVE-2026-62437(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
xen4.17.1+2-gb773c48e36-1 ... 4.20.3+127-gc42374a105-1 (25 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
xen4.20.0+68-g35cb38b222-1 ... 4.20.3+127-gc42374a105-1 (8 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
xen4.20.0+68-g35cb38b222-1, 4.20.2+37-g61ff35323e-1, 4.20.2+7-g1badcf5035-1, 4.20.2+7-g1badcf5035-2, 4.20.3+127-gc42374a105-1——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 33× 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.

  1. 2026-09-20 17:02 UTCEG score recompute
  2. 2026-09-20 17:02 UTCGHSA enrichment
  3. 2026-09-19 14:38 UTCEG score recompute
  4. 2026-09-19 14:38 UTCGHSA enrichment
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-18 12:14 UTCEG score recompute
  7. 2026-09-18 12:14 UTCGHSA enrichment
  8. 2026-09-17 09:49 UTCEG score recompute
  9. 2026-09-17 09:49 UTCGHSA enrichment
  10. 2026-09-16 14:08 UTCEPSS rescore
  11. 2026-09-16 07:25 UTCEG score recompute
  12. 2026-09-16 07:25 UTCGHSA enrichment
  13. 2026-09-16 05:15 UTCEPSS rescore
  14. 2026-09-15 05:01 UTCEG score recompute
  15. 2026-09-15 05:00 UTCGHSA enrichment
  16. 2026-09-14 02:32 UTCEG score recompute
  17. 2026-09-14 02:32 UTCGHSA enrichment
  18. 2026-09-13 00:08 UTCGHSA enrichment
  19. 2026-09-11 21:45 UTCEG score recompute
  20. 2026-09-11 21:45 UTCGHSA enrichment
  21. 2026-09-11 14:53 UTCEPSS rescore
  22. 2026-09-11 09:37 UTCEPSS rescore
  23. 2026-09-10 19:21 UTCGHSA enrichment
  24. 2026-09-10 18:25 UTCEG score recompute▲ 6.50
  25. 2026-09-10 18:25 UTCGHSA enrichment
Show 8 more
  1. 2026-09-10 18:24 UTCMITRE cvelistV5CVSS v3 → 6.5 · severity → MEDIUM
  2. 2026-09-08 19:50 UTCGHSA enrichment
  3. 2026-09-08 18:29 UTCNVD update
  4. 2026-09-08 18:14 UTCGHSA enrichment
  5. 2026-09-08 17:25 UTCMITRE cvelistV5
  6. 2026-09-08 13:25 UTCNVD update
  7. 2026-09-08 12:26 UTCEG score recompute
  8. 2026-09-08 12:24 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-62437?
CVE-2026-62437 is a medium vulnerability published on September 8, 2026. When guests are terminated, various pieces of cleanup need carrying out. The cleaning up of PCI devices which were assigned to guests, and the associated removal of tracking structures for IRQs used by the devices occurs relatively early in the process. Unfortunately after that point the guest…
When was CVE-2026-62437 disclosed?
CVE-2026-62437 was first published in the National Vulnerability Database on September 8, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-62437 actively exploited?
CVE-2026-62437 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 99.1% of all scored CVEs.
What is the CVSS score of CVE-2026-62437?
CVE-2026-62437 has a CVSS v3.1 base score of 6.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-62437?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-62437, 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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-62437

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