Vulnerability-Lookup

CVE-2026-71227 (GCVE-0-2026-71227)

Vulnerability from cvelistv5 – Published: 2026-08-05 12:42 – Updated: 2026-09-14 09:38

Title

Libkcapi: infinite loop denial of service in libkcapi _kcapi_aio_read_all() due to unhandled io_getevents() timeout return

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 enter a non-terminating wait loop. This can lead to a persistent denial of service, making the affected application or thread unresponsive.

Severity

5.1 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-05 13:10 UTC

CWE

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Assigner

redhat redhat root

References

6 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:56985	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:67265	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:67266	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:67267	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-71227	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2462867	issue-trackingx_refsource_REDHAT

Impacted products

6 products

Vendor	Product	Version	CPE status
Stephan Muelle	libkcapi	Affected: 0.12.0 , < 1.5.1 (semver)	guessed
Red Hat	Red Hat Enterprise Linux 10	Unaffected: 0:1.5.1-1.el10_2 , < * (rpm) cpe:/o:redhat:enterprise_linux:10.2
Red Hat	Red Hat Enterprise Linux 8	Unaffected: 0:1.4.0-3.el8_10 , < * (rpm) cpe:/o:redhat:enterprise_linux:8::baseos
Red Hat	Red Hat Enterprise Linux 9	Unaffected: 0:1.4.0-3.el9_8 , < * (rpm) cpe:/o:redhat:enterprise_linux:9::baseos
Red Hat	Red Hat Hardened Images	Unaffected: 1.5.1-0.1.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2026-08-05 12:29

Credits

This issue was discovered by Found by AISLE in partnership with Red Hat.

Show details on NVD website

JSON

To clipboard

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\"libkcapi\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:8::baseos\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 8\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:1.4.0-3.el8_10\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"libkcapi\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:9::baseos\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 9\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:1.4.0-3.el9_8\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"libkcapi\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:hummingbird:1\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Hardened Images\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"1.5.1-0.1.hum1\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"libkcapi-main\", \"collectionURL\": \"https://catalog.redhat.com/software/containers/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift:4\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Container Platform 4\", \"packageName\": \"openshift/ose-rhel-coreos-8\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift:4\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Container Platform 4\", \"packageName\": \"openshift/ose-rhel-coreos-9\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-04-26T20:17:44.000Z\", \"value\": \"Reported to Red Hat.\"}, {\"lang\": \"en\", \"time\": \"2026-08-05T12:29:09.516Z\", \"value\": \"Made public.\"}], \"datePublic\": \"2026-08-05T12:29:09.516Z\", \"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/security/cve/CVE-2026-71227\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2462867\", \"name\": \"RHBZ#2462867\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"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.\"}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-835\", \"description\": \"Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2026-09-14T09:38:05.172Z\"}, \"x_redhatCweChain\": \"CWE-835: Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)\"}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-71227\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-14T09:38:05.172Z\", \"dateReserved\": \"2026-08-05T09:15:14.859Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2026-08-05T12:42:10.427Z\", \"assignerShortName\": \"redhat\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

alsa-2026:67265

Vulnerability from osv_almalinux

Published

2026-09-14 00:00

Modified

2026-09-15 08:43

Summary

Moderate: libkcapi security, bug fix, and enhancement update

Details

libkcapi allows user-space to access the Linux kernel crypto API. This library uses the netlink interface and exports easy to use APIs so that a developer does not need to consider the low-level netlink interface handling. The library does not implement any cipher algorithms. All consumer requests are sent to the kernel for processing. Results from the kernel crypto API are returned to the consumer via the library API. The kernel interface and therefore this library can be used by unprivileged processes.

Security Fix(es):

libkcapi: IV reuse in libkcapi one-shot symmetric cipher chunking causes cipher state reset across chunk boundaries (CVE-2026-71225)
libkcapi: Memory corruption via uncanceled AIO requests on error in libkcapi's one-shot AIO path (CVE-2026-71226)
libkcapi: Infinite loop denial of service in libkcapi _kcapi_aio_read_all() due to unhandled io_getevents() timeout return (CVE-2026-71227)

Bug Fix(es) and Enhancement(s):

libkcapi: AEAD Decrypt Auth Check Skipped for Zero-Length Input in kcapi-enc [almalinux-9.8.z] (JIRA:AlmaLinux-242667)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2026:67265	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-71225	REPORT
	https://access.redhat.com/security/cve/CVE-2026-71226	REPORT
	https://access.redhat.com/security/cve/CVE-2026-71227	REPORT
	https://bugzilla.redhat.com/2462011	REPORT
	https://bugzilla.redhat.com/2462114	REPORT
	https://bugzilla.redhat.com/2462867	REPORT
	https://errata.almalinux.org/9/ALSA-2026-67265.html	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "libkcapi"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.0-3.el9_8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "libkcapi-hmaccalc"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.0-3.el9_8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "libkcapi allows user-space to access the Linux kernel crypto API. This library uses the netlink interface and exports easy to use APIs so that a developer does not need to consider the low-level netlink interface handling. The library does not implement any cipher algorithms. All consumer requests are sent to the kernel for processing. Results from the kernel crypto API are returned to the consumer via the library API. The kernel interface and therefore this library can be used by unprivileged processes.  \n\nSecurity Fix(es):  \n\n  * libkcapi: IV reuse in libkcapi one-shot symmetric cipher chunking causes cipher state reset across chunk boundaries (CVE-2026-71225)\n  * libkcapi: Memory corruption via uncanceled AIO requests on error in libkcapi\u0027s one-shot AIO path (CVE-2026-71226)\n  * libkcapi: Infinite loop denial of service in libkcapi _kcapi_aio_read_all() due to unhandled io_getevents() timeout return (CVE-2026-71227)\n\n\nBug Fix(es) and Enhancement(s):  \n\n  * libkcapi: AEAD Decrypt Auth Check Skipped for Zero-Length Input in `kcapi-enc` [almalinux-9.8.z] (JIRA:AlmaLinux-242667)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:67265",
  "modified": "2026-09-15T08:43:34Z",
  "published": "2026-09-14T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:67265"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-71225"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-71226"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-71227"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2462011"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2462114"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2462867"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/9/ALSA-2026-67265.html"
    }
  ],
  "related": [
    "CVE-2026-71225",
    "CVE-2026-71226",
    "CVE-2026-71227"
  ],
  "summary": "Moderate: libkcapi security, bug fix, and enhancement update"
}

alsa-2026:67266

Vulnerability from osv_almalinux

Published

2026-09-14 00:00

Modified

2026-09-14 09:51

Summary

Moderate: libkcapi security update

Details

Security Fix(es):

libkcapi: IV reuse in libkcapi one-shot symmetric cipher chunking causes cipher state reset across chunk boundaries (CVE-2026-71225)
libkcapi: Memory corruption via uncanceled AIO requests on error in libkcapi's one-shot AIO path (CVE-2026-71226)
libkcapi: Infinite loop denial of service in libkcapi _kcapi_aio_read_all() due to unhandled io_getevents() timeout return (CVE-2026-71227)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2026:67266	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-71225	REPORT
	https://access.redhat.com/security/cve/CVE-2026-71226	REPORT
	https://access.redhat.com/security/cve/CVE-2026-71227	REPORT
	https://bugzilla.redhat.com/2462011	REPORT
	https://bugzilla.redhat.com/2462114	REPORT
	https://bugzilla.redhat.com/2462867	REPORT
	https://errata.almalinux.org/8/ALSA-2026-67266.html	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:8",
        "name": "libkcapi"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.0-3.el8_10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:8",
        "name": "libkcapi-hmaccalc"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.0-3.el8_10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "libkcapi allows user-space to access the Linux kernel crypto API. This library uses the netlink interface and exports easy to use APIs so that a developer does not need to consider the low-level netlink interface handling. The library does not implement any cipher algorithms. All consumer requests are sent to the kernel for processing. Results from the kernel crypto API are returned to the consumer via the library API. The kernel interface and therefore this library can be used by unprivileged processes.  \n\nSecurity Fix(es):  \n\n  * libkcapi: IV reuse in libkcapi one-shot symmetric cipher chunking causes cipher state reset across chunk boundaries (CVE-2026-71225)\n  * libkcapi: Memory corruption via uncanceled AIO requests on error in libkcapi\u0027s one-shot AIO path (CVE-2026-71226)\n  * libkcapi: Infinite loop denial of service in libkcapi _kcapi_aio_read_all() due to unhandled io_getevents() timeout return (CVE-2026-71227)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:67266",
  "modified": "2026-09-14T09:51:20Z",
  "published": "2026-09-14T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:67266"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-71225"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-71226"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-71227"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2462011"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2462114"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2462867"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/8/ALSA-2026-67266.html"
    }
  ],
  "related": [
    "CVE-2026-71225",
    "CVE-2026-71226",
    "CVE-2026-71227"
  ],
  "summary": "Moderate: libkcapi security update"
}

alsa-2026:67267

Vulnerability from osv_almalinux

Published

2026-09-14 00:00

Modified

2026-09-14 09:35

Summary

Moderate: libkcapi security, bug fix, and enhancement update

Details

Security Fix(es):

libkcapi: IV reuse in libkcapi one-shot symmetric cipher chunking causes cipher state reset across chunk boundaries (CVE-2026-71225)
libkcapi: Memory corruption via uncanceled AIO requests on error in libkcapi's one-shot AIO path (CVE-2026-71226)
libkcapi: Infinite loop denial of service in libkcapi _kcapi_aio_read_all() due to unhandled io_getevents() timeout return (CVE-2026-71227)

Bug Fix(es) and Enhancement(s):

libkcapi: rebase to 1.5.1 [almalinux-10.2.z] (JIRA:AlmaLinux-242508)
libkcapi: AEAD Decrypt Auth Check Skipped for Zero-Length Input in kcapi-enc [almalinux-10.2.z] (JIRA:AlmaLinux-242665)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2026:67267	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-71225	REPORT
	https://access.redhat.com/security/cve/CVE-2026-71226	REPORT
	https://access.redhat.com/security/cve/CVE-2026-71227	REPORT
	https://bugzilla.redhat.com/2462011	REPORT
	https://bugzilla.redhat.com/2462114	REPORT
	https://bugzilla.redhat.com/2462867	REPORT
	https://errata.almalinux.org/10/ALSA-2026-67267.html	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libkcapi"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5.1-1.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libkcapi-hasher"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5.1-1.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libkcapi-hmaccalc"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5.1-1.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "libkcapi allows user-space to access the Linux kernel crypto API. This library uses the netlink interface and exports easy to use APIs so that a developer does not need to consider the low-level netlink interface handling. The library does not implement any cipher algorithms. All consumer requests are sent to the kernel for processing. Results from the kernel crypto API are returned to the consumer via the library API. The kernel interface and therefore this library can be used by unprivileged processes.  \n\nSecurity Fix(es):  \n\n  * libkcapi: IV reuse in libkcapi one-shot symmetric cipher chunking causes cipher state reset across chunk boundaries (CVE-2026-71225)\n  * libkcapi: Memory corruption via uncanceled AIO requests on error in libkcapi\u0027s one-shot AIO path (CVE-2026-71226)\n  * libkcapi: Infinite loop denial of service in libkcapi _kcapi_aio_read_all() due to unhandled io_getevents() timeout return (CVE-2026-71227)\n\n\nBug Fix(es) and Enhancement(s):  \n\n  * libkcapi: rebase to 1.5.1 [almalinux-10.2.z] (JIRA:AlmaLinux-242508)\n  * libkcapi: AEAD Decrypt Auth Check Skipped for Zero-Length Input in `kcapi-enc` [almalinux-10.2.z] (JIRA:AlmaLinux-242665)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:67267",
  "modified": "2026-09-14T09:35:51Z",
  "published": "2026-09-14T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:67267"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-71225"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-71226"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-71227"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2462011"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2462114"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2462867"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/10/ALSA-2026-67267.html"
    }
  ],
  "related": [
    "CVE-2026-71225",
    "CVE-2026-71226",
    "CVE-2026-71227"
  ],
  "summary": "Moderate: libkcapi security, bug fix, and enhancement update"
}

FKIE_CVE-2026-71227

Vulnerability from fkie_nvd - Published: 2026-08-05 13:24 - Updated: 2026-09-14 10:17

Severity

5.1 (Medium) - CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
5.1 (Medium) - CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

URL	Tags
secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:56985
secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:67265
secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:67266
secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:67267
secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-71227	Vendor Advisory
secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2462867	Exploit, Issue Tracking, Vendor Advisory

Impacted products

Vendor	Product	Version
redhat	hardened_images	-
redhat	openshift_container_platform	4.0
smuellerdd	libkcapi	*
redhat	enterprise_linux	8.0
redhat	enterprise_linux	9.0
redhat	enterprise_linux	10.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "libkcapi",
          "repo": "https://github.com/smuellerDD/libkcapi",
          "vendor": "Stephan Muelle",
          "versions": [
            {
              "lessThan": "1.5.1",
              "status": "affected",
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GHSA-C5MV-C5VM-62W5

Vulnerability from github – Published: 2026-08-05 15:32 – Updated: 2026-09-14 12:31

Details

Severity

5.1 (Medium)


                  
                    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-71227"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-835"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-05T13:24:47Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-c5mv-c5vm-62w5",
  "modified": "2026-09-14T12:31:31Z",
  "published": "2026-08-05T15:32:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-71227"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:56985"
    },
    {
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    },
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      "url": "https://access.redhat.com/errata/RHSA-2026:67267"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-71227"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2462867"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-71227

Vulnerability from csaf_microsoft - Published: 2026-08-09 01:03 - Updated: 2026-08-23 14:45

Summary

Libkcapi: infinite loop denial of service in libkcapi _kcapi_aio_read_all() due to unhandled io_getevents() timeout return

Scope

1 vulnerability in this advisory, including CVE-2026-71227.

CVE-2026-71227

5.1 (Medium)


                
                  CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Fixed: 1 product Known affected: 1 product

https://learn.microsoft.com/en-us/azure/azure-linux/tutoria…

Open the full advisory

RHSA-2026:56985

Vulnerability from csaf_redhat - Published: 2026-08-19 13:15 - Updated: 2026-09-14 09:38

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Severity

Moderate

Scope

3 vulnerabilities in this advisory, including CVE-2026-71227.

CVE-2026-71227

5.1 (Medium)


                
                  CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Fixed: 3 products

https://access.redhat.com/errata/RHSA-2026:56985

Open the full advisory

RHSA-2026:67265

Vulnerability from csaf_opensuse - Published: 2026-09-14 00:00 - Updated: 2026-09-16 18:51

Summary

security update for libkcapi

Severity

Moderate

Scope

3 vulnerabilities in this advisory, including CVE-2026-71227.

CVE-2026-71227

4.7 (Medium)


                
                  CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Recommended: 3 products

Open the full advisory

RHSA-2026:67266

Vulnerability from csaf_opensuse - Published: 2026-09-14 00:00 - Updated: 2026-09-16 18:51

Summary

security update for libkcapi

Severity

Moderate

Scope

3 vulnerabilities in this advisory, including CVE-2026-71227.

CVE-2026-71227

4.7 (Medium)


                
                  CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Recommended: 3 products

Open the full advisory

RHSA-2026:67267

Vulnerability from csaf_opensuse - Published: 2026-09-14 00:00 - Updated: 2026-09-16 18:51

Summary

security update for libkcapi

Severity

Moderate

Scope

3 vulnerabilities in this advisory, including CVE-2026-71227.

CVE-2026-71227

4.7 (Medium)


                
                  CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Recommended: 3 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-71227 (GCVE-0-2026-71227)

Vulnerability from osv_almalinux

Vulnerability from osv_almalinux

Vulnerability from osv_almalinux

Tags

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Nomenclature

Related by attack behaviour