CVE-2026-71227

MEDIUMNVD 5.15.1—
EchelonGraph scoreHIGH confidence

Score 5.1 from GitHub Security Advisory published 2026-08-05. NVD baseline CVSS 5.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — Patch released this week
5.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.1Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in libkcapi. A local attacker can influence an application that uses the Asynchronous Input/Output (AIO) interface. By reusing an AIO-enabled handle after a prior completion error, the _kcapi_aio_read_all() function can enter a non-terminating wait loop. This can lead to a persistent denial of service, making the affected application or thread unresponsive.

CVSS v3
5.1
EG Score
5.1(high)
EG Risk
23(Track)
EG Risk 23/100SSVC: 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
Severity51% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 19, 2026

Advisory Details (2)

Auto-updated Aug 5, 2026
Patch available. Sources: redhat.
redhat

2462867 – (CVE-2026-71227) CVE-2026-71227 libkcapi: Infinite loop denial of service in libkcapi _kcapi_aio_read_all() due to unhandled io_getevents() timeout return

https://bugzilla.redhat.com/show_bug.cgi?id=2462867
redhat Patch Available

CVE-2026-71227 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-71227

Vendor Advisories for CVE-2026-71227(3)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatlibkcapi-main-1.5.1-0.1.hum12026-08-19redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libkcapi1.2.1-1 ... 1.4.0-1 (6 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libkcapi1.4.0-1——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libkcapi1.4.0-1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libkcapi1.4.0-1——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 21× in last 7d / 54× 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. 2026-08-20 23:16 UTCEG score recompute
  2. 2026-08-20 23:16 UTCVendor advisory
  3. 2026-08-20 23:16 UTCGHSA enrichment
  4. 2026-08-20 22:56 UTCEPSS rescore
  5. 2026-08-19 21:21 UTCGHSA enrichment
  6. 2026-08-19 07:46 UTCEG score recompute
  7. 2026-08-19 07:46 UTCGHSA enrichment
  8. 2026-08-18 13:49 UTCEPSS rescore
  9. 2026-08-18 13:49 UTCEPSS rescore
  10. 2026-08-18 05:49 UTCEG score recompute
  11. 2026-08-18 05:49 UTCGHSA enrichment
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-17 03:54 UTCEG score recompute
  14. 2026-08-17 03:54 UTCGHSA enrichment
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 14:56 UTCEPSS rescore
  17. 2026-08-16 02:15 UTCEPSS rescore
  18. 2026-08-16 01:59 UTCEG score recompute
  19. 2026-08-16 01:59 UTCGHSA enrichment
  20. 2026-08-15 01:31 UTCEPSS rescore
  21. 2026-08-15 00:03 UTCGHSA enrichment
  22. 2026-08-13 22:07 UTCEG score recompute
  23. 2026-08-13 22:07 UTCGHSA enrichment
  24. 2026-08-13 22:00 UTCEPSS rescore
  25. 2026-08-12 20:12 UTCEG score recompute
Show 29 more
  1. 2026-08-12 20:12 UTCGHSA enrichment
  2. 2026-08-12 13:51 UTCEPSS rescore
  3. 2026-08-11 18:16 UTCEG score recompute▼ 0.40
  4. 2026-08-11 18:16 UTCGHSA enrichment
  5. 2026-08-11 18:16 UTCNVD updateCVSS v3 → 5.1
  6. 2026-08-11 17:56 UTCEG score recompute▲ 0.40
  7. 2026-08-11 17:56 UTCGHSA enrichment
  8. 2026-08-11 17:56 UTCNVD updateCVSS v3 → 5.5
  9. 2026-08-11 12:13 UTCEG score recompute
  10. 2026-08-11 12:13 UTCGHSA enrichment
  11. 2026-08-11 00:00 UTCEPSS rescore
  12. 2026-08-10 10:17 UTCEG score recompute
  13. 2026-08-10 10:17 UTCGHSA enrichment
  14. 2026-08-10 09:26 UTCEG score recompute
  15. 2026-08-10 09:26 UTCGHSA enrichment
  16. 2026-08-09 21:36 UTCEG score recompute
  17. 2026-08-09 21:36 UTCGHSA enrichment
  18. 2026-08-09 13:47 UTCEPSS rescore
  19. 2026-08-08 19:41 UTCEG score recompute
  20. 2026-08-08 19:41 UTCGHSA enrichment
  21. 2026-08-08 16:37 UTCEPSS rescore
  22. 2026-08-07 17:45 UTCEG score recompute
  23. 2026-08-07 17:45 UTCGHSA enrichment
  24. 2026-08-06 15:49 UTCEG score recompute
  25. 2026-08-06 15:49 UTCGHSA enrichment
  26. 2026-08-06 13:47 UTCEPSS rescore
  27. 2026-08-05 13:27 UTCEG score recompute
  28. 2026-08-05 13:07 UTCEG score recompute
  29. 2026-08-05 13:07 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-71227?
CVE-2026-71227 is a medium vulnerability published on August 5, 2026. A flaw was found in libkcapi. A local attacker can influence an application that uses the Asynchronous Input/Output (AIO) interface. By reusing an AIO-enabled handle after a prior completion error, the kcapiaioreadall() function can enter a non-terminating wait loop. This can lead to a persistent…
When was CVE-2026-71227 disclosed?
CVE-2026-71227 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71227 actively exploited?
CVE-2026-71227 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 96.9% of all scored CVEs.
What is the CVSS score of CVE-2026-71227?
CVE-2026-71227 has a CVSS v3 base score of 5.1 (NVD).
How do I remediate CVE-2026-71227?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71227, 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-2026-71227

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