{"id":"CVE-2026-71227","title":"A flaw was found in libkcapi","summary":"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 …","severity":"medium","cvss":5.1,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-835"],"vendor":"redhat","product":"hardened_images","affected":["hardened_images","openshift_container_platform = 4.0","libkcapi >= 0.12.0, < 1.5.1","enterprise_linux = 8.0","enterprise_linux = 9.0","enterprise_linux = 10.0"],"patched":["libkcapi 1.5.1"],"published":"2026-08-05","updated":"2026-09-21","sourceUpdated":"2026-09-21T13:17:10.180","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-71227","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:56985","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:67265","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:67266","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:67267","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:69285","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-71227","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2462867","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-71227.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-71227"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71227"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-08-05T13:10:05.043014Z"},"epss":0.00165,"epssPercentile":0.06192,"ingestedAt":"2026-08-10T10:39:35.865Z","slug":"CVE-2026-71227","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `hardened_images`\n- `openshift_container_platform = 4.0`\n- `libkcapi >= 0.12.0, < 1.5.1`\n- `enterprise_linux = 8.0`\n- `enterprise_linux = 9.0`\n- `enterprise_linux = 10.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `libkcapi 1.5.1`\n\n## Vendor advisories\n\n- **RHSA-2026:67267** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 10) · released 2026-09-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:67267)\n- **RHSA-2026:67266** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 8) · released 2026-09-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:67266)\n- **RHSA-2026:67265** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 9) · released 2026-09-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:67265)\n- **RHSA-2026:56985** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-08-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:56985)\n- **Red Hat VEX** · Moderate · affected: Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat OpenShift Container Platform 4 · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-71227.json)\n- **RHSA-2026:69285** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS EUS (v. 10.0) · released 2026-09-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:69285)","depth":"sunlit","depthScore":28,"depthScoreParts":{"impact":28.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}