CVE-2026-80553

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: Cancel existing workqueues

The initialization of the io_work and crw_work workqueues begs the question of whether they should be un-initialized. Add the corresponding cleanup tags in _release_dev to ensure work isn't dispatched after the private struct is free'd.

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 (5)

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

s390/vfio_ccw: Cancel existing workqueues - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e868ea8be0bc88c6982f48ecf3259d98afd884ae
generic

s390/vfio_ccw: Cancel existing workqueues - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/dc47a98abe6714577a25224534dbd356051097a3
generic

s390/vfio_ccw: Cancel existing workqueues - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b7ae0f7993867d009a4b554fc1d6d451c10580a0
generic

s390/vfio_ccw: Cancel existing workqueues - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/79c60b2c61105368dcc8444eb45847e21734f7c4
generic

s390/vfio_ccw: Cancel existing workqueues - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/77f5e888d2e607a0b3141fb95091ad6ef1cca9a2

Vendor Advisories for CVE-2026-80553(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 22:40 UTCGHSA enrichment
  3. 2026-08-29 11:21 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 12:11 UTCGHSA enrichment
  8. 2026-08-28 00:52 UTCEG score recompute
  9. 2026-08-28 00:52 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-2026-80553?
CVE-2026-80553 is a high vulnerability published on August 26, 2026. In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Cancel existing workqueues The initialization of the iowork and crwwork workqueues begs the question of whether they should be un-initialized. Add the corresponding cleanup tags in releasedev to ensure work isn't…
When was CVE-2026-80553 disclosed?
CVE-2026-80553 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-2026-80553 actively exploited?
CVE-2026-80553 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-2026-80553?
CVE-2026-80553 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-80553?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-80553, 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-2026-80553

Explore →

Is Your Infrastructure Affected by CVE-2026-80553?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.