CVE-2026-80552

HIGHPre-NVD 8.88.8
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-27. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
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.

In the Linux kernel, the following vulnerability has been resolved:

s390/vfio_ccw: Ensure index for read/write regions are within range

The introduction of the capability chain rightly clamped the region indexes to the range of the capabilities itself, but neglected to do so for the existing read/write regions which should also be enforced.

CVSS v3
8.8
EG Score
8.8(high)
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
3%
KEV
Not listed

Published

August 26, 2026

Last Modified

August 27, 2026

Advisory Details (6)

Auto-updated Aug 27, 2026
No patch confirmed yet.
generic

s390/vfio_ccw: Ensure index for read/write regions are within range - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d597fa1273802941c7801202135976fecc29672b
generic

s390/vfio_ccw: Ensure index for read/write regions are within range - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d3b1e38404b22df5a1f93019f2bb656feaad5ae3
generic

s390/vfio_ccw: Ensure index for read/write regions are within range - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9f5f9a78fedc45bc29d6a0a64e3a3472361afae5
generic

s390/vfio_ccw: Ensure index for read/write regions are within range - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/988d9b5be3c2c4baf9457ce8e11b477e13eb9fcf
generic

s390/vfio_ccw: Ensure index for read/write regions are within range - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/79ea5e0c4c8a9842ae85f45062d947b3297dfc07
generic

s390/vfio_ccw: Ensure index for read/write regions are within range - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/649badf3a2fd8929e40198603a2cb21b74c21700

Vendor Advisories for CVE-2026-80552(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 19× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 22:49 UTCGHSA enrichment
  3. 2026-08-29 11:24 UTCGHSA enrichment
  4. 2026-08-28 23:58 UTCEG score recompute
  5. 2026-08-28 23:58 UTCGHSA enrichment
  6. 2026-08-28 21:42 UTCEPSS rescore
  7. 2026-08-28 12:24 UTCGHSA enrichment
  8. 2026-08-28 00:57 UTCEG score recompute
  9. 2026-08-28 00:57 UTCGHSA enrichment
  10. 2026-08-27 14:25 UTCEPSS rescore
  11. 2026-08-27 13:33 UTCEG score recompute
  12. 2026-08-27 13:33 UTCGHSA enrichment
  13. 2026-08-27 13:00 UTCEG score recompute
  14. 2026-08-27 13:00 UTCGHSA enrichment
  15. 2026-08-27 06:19 UTCEG score recompute 8.80
  16. 2026-08-27 06:11 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  17. 2026-08-26 15:43 UTCNVD update
  18. 2026-08-26 14:42 UTCEG score recompute
  19. 2026-08-26 14:41 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-80552?
CVE-2026-80552 is a high vulnerability published on August 26, 2026. In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Ensure index for read/write regions are within range The introduction of the capability chain rightly clamped the region indexes to the range of the capabilities itself, but neglected to do so for the existing…
When was CVE-2026-80552 disclosed?
CVE-2026-80552 was first published in the National Vulnerability Database on August 26, 2026, with the most recent update on August 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-80552 actively exploited?
CVE-2026-80552 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 97.2% of all scored CVEs.
What is the CVSS score of CVE-2026-80552?
CVE-2026-80552 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-80552?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-80552, 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

Explore the affected products and dependency analysis for CVE-2026-80552

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