{"id":"CVE-2026-71225","aliases":[],"cve":{"records":[{"id":"CVE-2026-71225","source":"redhat","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-08-05T09:15:14.859Z","published":"2026-08-05T12:16:52.748Z","modified":"2026-11-02T05:13:21.032Z"}],"publishers":[{"name":"redhat","role":"CNA","organizationId":"53f830b8-0a3f-465b-8143-3b8a9948e749","modified":"2026-11-02T05:13:21.032Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-08-05T14:21:01.348Z"}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:56985","tags":["vendor-advisory","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://access.redhat.com/errata/RHSA-2026:67265","tags":["vendor-advisory","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://access.redhat.com/errata/RHSA-2026:67266","tags":["vendor-advisory","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://access.redhat.com/errata/RHSA-2026:67267","tags":["vendor-advisory","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://access.redhat.com/errata/RHSA-2026:69285","tags":["vendor-advisory","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://access.redhat.com/errata/RHSA-2026:87712","tags":["vendor-advisory","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://access.redhat.com/security/cve/CVE-2026-71225","tags":["vdb-entry","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2462011","tags":["issue-tracking","x_refsource_REDHAT"],"source":"redhat"}],"weaknesses":[{"id":"CWE-330","description":"Use of Insufficiently Random Values","source":"redhat"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-08-05T14:20:51.007088Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Libkcapi: iv reuse in libkcapi one-shot symmetric cipher chunking causes cipher state reset across chunk boundaries","titleSource":"redhat","descriptionSource":"redhat","description":"A flaw was found in libkcapi. When performing one-shot symmetric cipher operations on large inputs (over 64 KiB) in stateful modes such as Counter (CTR) or Cipher Block Chaining (CBC), the library improperly reuses the Initialization Vector (IV) for each internal data chunk. A remote attacker could potentially exploit this by making an application that uses libkcapi process specially crafted large inputs. This can lead to a significant weakening of data confidentiality, as the repeated IV use can expose relationships in encrypted plaintext, and may also affect data integrity by causing incorrect cryptographic processing.","score":6.5,"severity":"medium","published":"2026-08-05T12:16:52.748Z","modified":"2026-11-02T05:13:21.032Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Stephan Muelle","name":"libkcapi","platforms":[],"versions":[{"version":"0.10.1","status":"affected","lessThan":"1.5.1","versionType":"semver"}],"defaultStatus":"unaffected","cpes":[],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-71225"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 10","platforms":[],"versions":[{"version":"0:1.5.1-1.el10_2","status":"unaffected","lessThan":"*","versionType":"rpm"}],"defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux:10.2"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-71225"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 10.0 Extended Update Support","platforms":[],"versions":[{"version":"0:1.5.0-6.el10_0","status":"unaffected","lessThan":"*","versionType":"rpm"}],"defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-71225"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 8","platforms":[],"versions":[{"version":"0:1.4.0-3.el8_10","status":"unaffected","lessThan":"*","versionType":"rpm"}],"defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux:8::baseos"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-71225"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 9","platforms":[],"versions":[{"version":"0:1.4.0-3.el9_8","status":"unaffected","lessThan":"*","versionType":"rpm"}],"defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux:9::baseos"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-71225"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 9.6 Extended Update Support","platforms":[],"versions":[{"version":"0:1.4.0-2.el9_6.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"defaultStatus":"affected","cpes":["cpe:/o:redhat:rhel_eus:9.6::baseos"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-71225"},{"vendor":"Red Hat","name":"Red Hat Hardened Images","platforms":[],"versions":[{"version":"1.5.1-0.1.hum1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"defaultStatus":"affected","cpes":["cpe:/a:redhat:hummingbird:1"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-71225"},{"vendor":"Red Hat","name":"Red Hat OpenShift Container Platform 4","platforms":[],"versions":[],"defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift:4"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-71225"},{"vendor":"Red Hat","name":"Red Hat OpenShift Container Platform 4","platforms":[],"versions":[],"defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift:4"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-71225"},{"vendor":"Red Hat","name":"Red Hat OpenShift Container Platform 5","platforms":[],"versions":[],"defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift:5"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-71225"}],"remediation":[{"text":"To mitigate this issue, applications using `libkcapi` should avoid the one-shot symmetric cipher APIs for inputs exceeding 64 KiB when continuous-message semantics are critical. Instead, prefer the streaming interface for processing large messages, or ensure one-shot inputs remain below the internal chunking threshold to guarantee the IV is applied consistently throughout the operation.","source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-71225"}],"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-2026-71225","https://bugzilla.redhat.com/show_bug.cgi?id=2462011"],"sources":[{"name":"CVE","id":"CVE-2026-71225","modified":"2026-11-02T05:13:21.032Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-71225"}],"assessments":[{"source":"redhat","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","score":6.5}],"sourceAffected":[],"observedAt":"2026-11-02T05:25:55.616Z","kev":{"status":"not-listed","checkedAt":"2026-11-05T11:05:32.134Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-02T05:30:31.991Z","attemptedAt":"2026-11-02T05:30:31.991Z"},{"source":"GHSA","status":"available","checkedAt":"2026-11-02T05:30:31.457Z","attemptedAt":"2026-11-02T05:30:31.457Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-02T05:30:31.275Z","attemptedAt":"2026-11-02T05:30:31.275Z"},{"source":"EPSS","status":"available","checkedAt":"2026-11-02T05:30:31.025Z","attemptedAt":"2026-11-02T05:30:31.025Z"}],"evidence":[{"source":"FIRST EPSS","id":"CVE-2026-71225","url":"https://www.first.org/epss/","probability":0.00345,"percentile":0.28116,"date":"2026-11-01","checkedAt":"2026-11-02T05:30:31.025Z"},{"source":"ENISA EUVD","id":"EUVD-2026-53336","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-53336","modified":"Oct 22, 2026, 8:42:38 PM","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","checkedAt":"2026-11-02T05:30:31.275Z"},{"source":"GitHub Advisory Database","id":"GHSA-qv62-qmw8-96h9","url":"https://github.com/advisories/GHSA-qv62-qmw8-96h9","modified":"2026-10-22T21:33:04Z","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","checkedAt":"2026-11-02T05:30:31.457Z"},{"source":"NVD","id":"CVE-2026-71225","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71225","modified":"2026-10-22T21:17:21.860","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","checkedAt":"2026-11-02T05:30:31.991Z"},{"source":"NVD","id":"CVE-2026-71225","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71225","modified":"2026-10-22T21:17:21.860","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","checkedAt":"2026-11-02T05:30:31.991Z"}],"aiSummary":{"text":"Libkcapi versions before 1.5.1 are affected by a flaw that reuses the Initialization Vector (IV) for each internal data chunk in one-shot symmetric cipher operations, potentially weakening data confidentiality and integrity. A remote attacker could exploit this by making an application process specially crafted large inputs. This affects libkcapi when used in stateful modes like Counter or Cipher Block Chaining.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-02T05:26:10.350Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-71225"}]}}