{"id":"CVE-2026-71226","state":"PUBLISHED","title":"Libkcapi: memory corruption via uncanceled aio requests on error in libkcapi's one-shot aio path","description":"Memory Corruption via Uncanceled AIO Requests on Error: libkcapi's one-shot AIO path can return an error before all submitted IOCBs are drained, allowing later kernel writes into caller-owned output buffers.","publishedAt":"2026-08-05T12:37:17.360Z","updatedAt":"2026-10-30T05:59:15.849Z","severity":{"score":7.3,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","source":"redhat"},"assigner":"redhat","products":["Stephan Muelle libkcapi","Red Hat Red Hat Enterprise Linux 10","Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support","Red Hat Red Hat Enterprise Linux 8","Red Hat Red Hat Enterprise Linux 9","Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support","Red Hat Red Hat Hardened Images","Red Hat Red Hat OpenShift Container Platform 4","Red Hat Red Hat OpenShift Container Platform 5"],"affected":[{"vendor":"Stephan Muelle","product":"libkcapi","defaultStatus":"unaffected","versions":[{"version":"0.12.0","status":"affected","lessThan":"1.5.1","versionType":"semver"}],"repo":"https://github.com/smuellerDD/libkcapi"},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","packageName":"libkcapi","defaultStatus":"affected","versions":[{"version":"0:1.5.1-1.el10_2","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.2"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10.0 Extended Update Support","packageName":"libkcapi","defaultStatus":"affected","versions":[{"version":"0:1.5.0-6.el10_0","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","packageName":"libkcapi","defaultStatus":"affected","versions":[{"version":"0:1.4.0-3.el8_10","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8::baseos"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","packageName":"libkcapi","defaultStatus":"affected","versions":[{"version":"0:1.4.0-3.el9_8","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9::baseos"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.6 Extended Update Support","packageName":"libkcapi","defaultStatus":"affected","versions":[{"version":"0:1.4.0-2.el9_6.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:rhel_eus:9.6::baseos"]},{"vendor":"Red Hat","product":"Red Hat Hardened Images","packageName":"libkcapi-main","defaultStatus":"affected","versions":[{"version":"1.5.1-0.1.hum1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:hummingbird:1"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","packageName":"openshift/ose-rhel-coreos-8","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:4"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","packageName":"openshift/ose-rhel-coreos-9","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:4"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 5","packageName":"openshift/ose-rhel-coreos-9","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:5"]}],"references":["https://access.redhat.com/errata/RHSA-2026:56985","https://access.redhat.com/errata/RHSA-2026:67265","https://access.redhat.com/errata/RHSA-2026:67266","https://access.redhat.com/errata/RHSA-2026:67267","https://access.redhat.com/errata/RHSA-2026:69285","https://access.redhat.com/errata/RHSA-2026:87712","https://access.redhat.com/security/cve/CVE-2026-71226","https://bugzilla.redhat.com/show_bug.cgi?id=2462114"],"weaknesses":["CWE-416"],"ingestedAt":"2026-10-30T06:06:06.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/71xxx/CVE-2026-71226.json","commit":"7d356f168d29b5ac08c12cc8e868dcae7ddd6aad","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-71226","state":"PUBLISHED","datePublished":"2026-08-05T12:37:17.360Z","dateUpdated":"2026-10-30T05:59:15.849Z","assignerShortName":"redhat","assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateReserved":"2026-08-05T09:15:14.859Z"},"containers":{"cna":{"title":"Libkcapi: memory corruption via uncanceled aio requests on error in libkcapi's one-shot aio path","descriptions":[{"lang":"en","value":"Memory Corruption via Uncanceled AIO Requests on Error: libkcapi's one-shot AIO path can return an error before all submitted IOCBs are drained, allowing later kernel writes into caller-owned output buffers."}],"affected":[{"vendor":"Stephan Muelle","product":"libkcapi","defaultStatus":"unaffected","versions":[{"version":"0.12.0","status":"affected","lessThan":"1.5.1","versionType":"semver"}],"repo":"https://github.com/smuellerDD/libkcapi"},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","packageName":"libkcapi","defaultStatus":"affected","versions":[{"version":"0:1.5.1-1.el10_2","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.2"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10.0 Extended Update Support","packageName":"libkcapi","defaultStatus":"affected","versions":[{"version":"0:1.5.0-6.el10_0","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","packageName":"libkcapi","defaultStatus":"affected","versions":[{"version":"0:1.4.0-3.el8_10","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8::baseos"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","packageName":"libkcapi","defaultStatus":"affected","versions":[{"version":"0:1.4.0-3.el9_8","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9::baseos"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.6 Extended Update Support","packageName":"libkcapi","defaultStatus":"affected","versions":[{"version":"0:1.4.0-2.el9_6.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:rhel_eus:9.6::baseos"]},{"vendor":"Red Hat","product":"Red Hat Hardened Images","packageName":"libkcapi-main","defaultStatus":"affected","versions":[{"version":"1.5.1-0.1.hum1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:hummingbird:1"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","packageName":"openshift/ose-rhel-coreos-8","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:4"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","packageName":"openshift/ose-rhel-coreos-9","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:4"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 5","packageName":"openshift/ose-rhel-coreos-9","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:5"]}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:56985","name":"RHSA-2026:56985","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:67265","name":"RHSA-2026:67265","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:67266","name":"RHSA-2026:67266","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:67267","name":"RHSA-2026:67267","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:69285","name":"RHSA-2026:69285","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:87712","name":"RHSA-2026:87712","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-71226","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2462114","name":"RHBZ#2462114","tags":["issue-tracking","x_refsource_REDHAT"]}],"metrics":[{"other":{"content":{"value":"Moderate","namespace":"https://access.redhat.com/security/updates/classification/"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.3,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-416","description":"Use After Free","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"redhat","orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateUpdated":"2026-10-30T05:59:15.849Z"},"datePublic":"2026-08-05T12:22:09.014Z","x_redhatCweChain":"CWE-416: Use After Free","workarounds":[{"lang":"en","value":"To mitigate this issue, applications should avoid initializing libkcapi handles with the `KCAPI_INIT_AIO` flag, preferring synchronous interfaces instead. If the real AIO path must be enabled, applications must ensure that `outiov` buffers are not immediately freed or reused after an error return, allowing all kernel completions to finish. This operational control prevents delayed kernel writes into potentially reallocated or freed memory."}],"timeline":[{"lang":"en","time":"2026-04-26T18:17:10.000Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-08-05T12:22:09.014Z","value":"Made public."}],"credits":[{"lang":"en","value":"This issue was discovered by Found by AISLE in partnership with Red Hat."}],"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-05T13:35:50.105591Z","id":"CVE-2026-71226","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-05T13:36:23.414Z"}}]}}}