Medium [CVE-2026-71227] Infinite loop denial of service in libkcapi _kcapi_aio_read_all due to unhandled io_getevents timeout return
This medium-severity Red Hat Linux advisory covers CVE-2026-71227 affecting Red Hat Hardened Images, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.
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Summary
Infinite loop denial of service in libkcapi _kcapi_aio_read_all() due to unhandled io_getevents() timeout return. Red Hat rates this moderate (CVSS 5.1).
Weakness: CWE-835. Red Hat lists fixing advisory RHSA-2026:56985 with package libkcapi-main-1.5.1-0.1.hum1.
Affected products named by the advisory: Red Hat Hardened Images; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; and 1 more.
Affected products named by the advisory: Red Hat OpenShift Container Platform 4; Red Hat Enterprise Linux 10.0 Extended Update Support.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- libkcapi-main-1.5.1-0.1.hum1
- RHSA-2026:56985
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- To mitigate this issue, applications should avoid initializing `libkcapi` handles with `KCAPI_INIT_AIO` if AIO functionality is not strictly required. If AIO must be used, applications should destroy and reinitialize `libkcapi` handles after any AIO completion error, rather than reusing them for subsequent AIO operations.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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