Vulnerability-Lookup

CVE-2026-72693 (GCVE-0-2026-72693)

Vulnerability from cvelistv5 – Published: 2026-08-11 08:39 – Updated: 2026-10-09 03:46

Title

Kbd: local privilege escalation in openvt via incorrect process owner verification allowing passwordless root login

Summary

`openvt -u` is intended to identify the owner of the current VT and then execute `login` as that user from a privileged context. In the documented `kbrequest`/init usage, the ownership test in `authenticate_user()` relies on `stat("/proc/<pid>/fd/0")`. `stat()` on `/proc/<pid>/fd/0` follows the symlink to the underlying TTY device node. As a result, `buf.st_uid` reflects the owner of the TTY node rather than the owner of the process holding the file descriptor. If the TTY owner returns to `root` or the getty owner after logout while an unprivileged process still has `fd 0` attached to that TTY, the check can incorrectly treat that process as belonging to the privileged console owner. Once that check succeeds, the `-u` path executes a passwordless login as the selected user. In the documented `kbrequest`/init deployment using `openvt -us`, this can result in passwordless `login -f root` on the spawned VT. This report establishes that privilege escalation path for that documented deployment; it does not claim equivalent reachability for deployments that do not use `openvt -u` from a privileged `kbrequest`/init path.

Severity

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-11 17:44 UTC

CWE

CWE-284 - Improper Access Control

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1042 records in the last 180 days details

References

8 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:41136	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:57597	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:57610	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60440	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:66357	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:78951	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-72693	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2462115	issue-trackingx_refsource_REDHAT

Impacted products

9 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	Unaffected: 0:2.6.4-8.el10_2 , < * (rpm) cpe:/o:redhat:enterprise_linux:10.2
Red Hat	Red Hat Enterprise Linux 8	Unaffected: 0:2.0.4-11.el8_10.1 , < * (rpm) cpe:/o:redhat:enterprise_linux:8::baseos
Red Hat	Red Hat Enterprise Linux 9	Unaffected: 0:2.4.0-12.el9_8 , < * (rpm) cpe:/o:redhat:enterprise_linux:9::baseos
Red Hat	Red Hat OpenShift Container Platform 4.22	Unaffected: 4.22.9.8.202608251819-0 , < * (rpm) cpe:/a:redhat:openshift:4.22::el9
Red Hat	Red Hat OpenShift Container Platform 4.22	Unaffected: 4.22.9.8.202609081748-0 , < * (rpm) cpe:/a:redhat:openshift:4.22::el9
Red Hat	Red Hat Hardened Images	Unaffected: 2.10.0-2.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2026-08-11 06:58

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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            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2462115"
          }
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        "sourceIdentifier": "secalert@redhat.com",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-284"
              }
            ],
            "source": "secalert@redhat.com",
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      }
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      "initial_release_date": "2026-08-11T06:58:59.200000+00:00",
      "product_status:fixed": "60",
      "product_status:known_affected": "6",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kbd: Local privilege escalation in openvt via incorrect process owner verification allowing passwordless root login",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72693.json",
      "version": "3"
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    "suse_vex": {
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      "product_status:known_affected": "429",
      "product_status:recommended": "68",
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      "status": "interim",
      "title": "SUSE CVE CVE-2026-72693",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-72693.json",
      "version": "17"
    },
    "vulnrichment": {
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          {
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              {
                "other": {
                  "content": {
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                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-08-11T17:44:26.656399Z",
                    "version": "2.0.3"
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                  "type": "ssvc"
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              "shortName": "CISA-ADP"
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              "cpes": [
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              "defaultStatus": "affected",
              "packageName": "kbd",
              "product": "Red Hat Enterprise Linux 10",
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              "cpes": [
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              "defaultStatus": "affected",
              "packageName": "kbd",
              "product": "Red Hat Enterprise Linux 9",
              "vendor": "Red Hat",
              "versions": [
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            },
            {
              "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
              "cpes": [
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              "defaultStatus": "affected",
              "packageName": "openshift/ose-rhel-coreos-9",
              "product": "Red Hat OpenShift Container Platform 4.22",
              "vendor": "Red Hat",
              "versions": [
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                  "lessThan": "*",
                  "status": "unaffected",
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                  "versionType": "rpm"
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            {
              "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
              "cpes": [
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              "defaultStatus": "affected",
              "packageName": "openshift/ose-rhel-coreos-9",
              "product": "Red Hat OpenShift Container Platform 4.22",
              "vendor": "Red Hat",
              "versions": [
                {
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                  "status": "unaffected",
                  "version": "4.22.9.8.202609081748-0",
                  "versionType": "rpm"
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              ]
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              "collectionURL": "https://catalog.redhat.com/software/containers/",
              "cpes": [
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              "packageName": "kbd-main",
              "product": "Red Hat Hardened Images",
              "vendor": "Red Hat",
              "versions": [
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                  "lessThan": "*",
                  "status": "unaffected",
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                  "versionType": "rpm"
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              "product": "Red Hat Enterprise Linux 6",
              "vendor": "Red Hat"
            },
            {
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              "cpes": [
                "cpe:/o:redhat:enterprise_linux:7"
              ],
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              "packageName": "kbd",
              "product": "Red Hat Enterprise Linux 7",
              "vendor": "Red Hat"
            },
            {
              "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
              "cpes": [
                "cpe:/a:redhat:openshift:4"
              ],
              "defaultStatus": "affected",
              "packageName": "openshift/ose-rhel-coreos-8",
              "product": "Red Hat OpenShift Container Platform 4",
              "vendor": "Red Hat"
            }
          ],
          "credits": [
            {
              "lang": "en",
              "value": "This issue was discovered by Found by AISLE in partnership with Red Hat."
            }
          ],
          "datePublic": "2026-08-11T06:58:59.200Z",
          "descriptions": [
            {
              "lang": "en",
              "value": "`openvt -u` is intended to identify the owner of the current VT and then execute `login` as that user from a privileged context. In the documented `kbrequest`/init usage, the ownership test in `authenticate_user()` relies on `stat(\"/proc/\u003cpid\u003e/fd/0\")`. `stat()` on `/proc/\u003cpid\u003e/fd/0` follows the symlink to the underlying TTY device node. As a result, `buf.st_uid` reflects the owner of the TTY node rather than the owner of the process holding the file descriptor. If the TTY owner returns to `root` or the getty owner after logout while an unprivileged process still has `fd 0` attached to that TTY, the check can incorrectly treat that process as belonging to the privileged console owner. Once that check succeeds, the `-u` path executes a passwordless login as the selected user. In the documented `kbrequest`/init deployment using `openvt -us`, this can result in passwordless `login -f root` on the spawned VT. This report establishes that privilege escalation path for that documented deployment; it does not claim equivalent reachability for deployments that do not use `openvt -u` from a privileged `kbrequest`/init path."
            }
          ],
          "metrics": [
            {
              "other": {
                "content": {
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            },
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "format": "CVSS"
            }
          ],
          "problemTypes": [
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                  "description": "Improper Access Control",
                  "lang": "en",
                  "type": "CWE"
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              ]
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          },
          "references": [
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              "name": "RHSA-2026:41136",
              "tags": [
                "vendor-advisory",
                "x_refsource_REDHAT"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2026:41136"
            },
            {
              "name": "RHSA-2026:57597",
              "tags": [
                "vendor-advisory",
                "x_refsource_REDHAT"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2026:57597"
            },
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              "name": "RHSA-2026:57610",
              "tags": [
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                "x_refsource_REDHAT"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2026:57610"
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              "tags": [
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              "tags": [
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              ],
              "url": "https://access.redhat.com/errata/RHSA-2026:66357"
            },
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              "name": "RHSA-2026:78951",
              "tags": [
                "vendor-advisory",
                "x_refsource_REDHAT"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2026:78951"
            },
            {
              "tags": [
                "vdb-entry",
                "x_refsource_REDHAT"
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              "url": "https://access.redhat.com/security/cve/CVE-2026-72693"
            },
            {
              "name": "RHBZ#2462115",
              "tags": [
                "issue-tracking",
                "x_refsource_REDHAT"
              ],
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2462115"
            }
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          "timeline": [
            {
              "lang": "en",
              "time": "2026-04-26T18:17:20.000Z",
              "value": "Reported to Red Hat."
            },
            {
              "lang": "en",
              "time": "2026-08-11T06:58:59.200Z",
              "value": "Made public."
            }
          ],
          "title": "Kbd: local privilege escalation in openvt via incorrect process owner verification allowing passwordless root login",
          "workarounds": [
            {
              "lang": "en",
              "value": "To mitigate this issue, avoid using `openvt -u` in privileged `kbrequest`/init deployments. Instead, configure the keyboard request to initiate a standard authenticated login on the new virtual terminal, or disable the keyboard request binding entirely until a fix is available. Changes to `kbrequest` configurations may require a system restart or service reload to take effect."
            }
          ],
          "x_generator": {
            "engine": "cvelib 1.8.0"
          },
          "x_redhatCweChain": "CWE-284: Improper Access Control"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
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        "datePublished": "2026-08-11T08:39:24.983Z",
        "dateReserved": "2026-08-10T12:35:16.746Z",
        "dateUpdated": "2026-10-09T03:46:24.896Z",
        "state": "PUBLISHED"
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      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
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}

ALSA-2026:57597

Vulnerability from osv_almalinux – Published: 2026-08-20 00:00 – Updated: 2026-08-21 09:20 – Source website

Summary

Moderate: kbd security update

Details

The kbd packages provide tools for managing console behavior on a Linux system, including the keyboard, screen fonts, virtual terminals, and font files.

Security Fix(es):

kbd: Local privilege escalation in openvt via incorrect process owner verification allowing passwordless root login (CVE-2026-72693)

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-2026:57597	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-72693	REPORT
	https://bugzilla.redhat.com/2462115	REPORT
	https://errata.almalinux.org/10/ALSA-2026-57597.html	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "kbd"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.6.4-8.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "kbd-legacy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.6.4-8.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "kbd-misc"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.6.4-8.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "The kbd packages provide tools for managing console behavior on a Linux system, including the keyboard, screen fonts, virtual terminals, and font files.  \n\nSecurity Fix(es):  \n\n  * kbd: Local privilege escalation in openvt via incorrect process owner verification allowing passwordless root login (CVE-2026-72693)\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-2026:57597",
  "modified": "2026-08-21T09:20:51Z",
  "published": "2026-08-20T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:57597"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-72693"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2462115"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/10/ALSA-2026-57597.html"
    }
  ],
  "related": [
    "CVE-2026-72693"
  ],
  "summary": "Moderate: kbd security update"
}

ALSA-2026:57610

Vulnerability from osv_almalinux – Published: 2026-08-20 00:00 – Updated: 2026-08-21 09:21 – Source website

Summary

Moderate: kbd security update

Details

The kbd packages provide tools for managing console behavior on a Linux system, including the keyboard, screen fonts, virtual terminals, and font files.

Security Fix(es):

kbd: Local privilege escalation in openvt via incorrect process owner verification allowing passwordless root login (CVE-2026-72693)

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-2026:57610	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-72693	REPORT
	https://bugzilla.redhat.com/2462115	REPORT
	https://errata.almalinux.org/9/ALSA-2026-57610.html	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "kbd"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.0-12.el9_8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "kbd-legacy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.0-12.el9_8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "kbd-misc"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.0-12.el9_8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "The kbd packages provide tools for managing console behavior on a Linux system, including the keyboard, screen fonts, virtual terminals, and font files.  \n\nSecurity Fix(es):  \n\n  * kbd: Local privilege escalation in openvt via incorrect process owner verification allowing passwordless root login (CVE-2026-72693)\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-2026:57610",
  "modified": "2026-08-21T09:21:24Z",
  "published": "2026-08-20T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:57610"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-72693"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2462115"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/9/ALSA-2026-57610.html"
    }
  ],
  "related": [
    "CVE-2026-72693"
  ],
  "summary": "Moderate: kbd security update"
}

ALSA-2026:78951

Vulnerability from osv_almalinux – Published: 2026-10-08 00:00 – Updated: 2026-10-09 07:23 – Source website

Summary

Moderate: kbd security update

Details

The kbd packages provide tools for managing console behavior on a Linux system, including the keyboard, screen fonts, virtual terminals, and font files.

Security Fix(es):

kbd: Local privilege escalation in openvt via incorrect process owner verification allowing passwordless root login (CVE-2026-72693)

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-2026:78951	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-72693	REPORT
	https://bugzilla.redhat.com/2462115	REPORT
	https://errata.almalinux.org/8/ALSA-2026-78951.html	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:8",
        "name": "kbd"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.4-11.el8_10.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:8",
        "name": "kbd-legacy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.4-11.el8_10.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:8",
        "name": "kbd-misc"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.4-11.el8_10.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "The kbd packages provide tools for managing console behavior on a Linux system, including the keyboard, screen fonts, virtual terminals, and font files.  \n\nSecurity Fix(es):  \n\n  * kbd: Local privilege escalation in openvt via incorrect process owner verification allowing passwordless root login (CVE-2026-72693)\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-2026:78951",
  "modified": "2026-10-09T07:23:53Z",
  "published": "2026-10-08T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:78951"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-72693"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2462115"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/8/ALSA-2026-78951.html"
    }
  ],
  "related": [
    "CVE-2026-72693"
  ],
  "summary": "Moderate: kbd security update"
}

FKIE_CVE-2026-72693

Vulnerability from fkie_nvd - Published: 2026-08-11 09:17 - Updated: 2026-10-09 04:18

Severity

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

Summary

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:41136
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:57597
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:57610
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:60440
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:66357
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:78951
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-72693
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2462115

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10.2"
          ],
          "defaultStatus": "affected",
          "packageName": "kbd",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:2.6.4-8.el10_2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:8::baseos"
          ],
          "defaultStatus": "affected",
          "packageName": "kbd",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:2.0.4-11.el8_10.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9::baseos"
          ],
          "defaultStatus": "affected",
          "packageName": "kbd",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:2.4.0-12.el9_8",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:openshift:4.22::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "openshift/ose-rhel-coreos-9",
          "product": "Red Hat OpenShift Container Platform 4.22",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "4.22.9.8.202608251819-0",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:openshift:4.22::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "openshift/ose-rhel-coreos-9",
          "product": "Red Hat OpenShift Container Platform 4.22",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "4.22.9.8.202609081748-0",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:hummingbird:1"
          ],
          "defaultStatus": "affected",
          "packageName": "kbd-main",
          "product": "Red Hat Hardened Images",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "2.10.0-2.hum1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:6"
          ],
          "defaultStatus": "unknown",
          "packageName": "kbd",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:7"
          ],
          "defaultStatus": "affected",
          "packageName": "kbd",
          "product": "Red Hat Enterprise Linux 7",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:openshift:4"
          ],
          "defaultStatus": "affected",
          "packageName": "openshift/ose-rhel-coreos-8",
          "product": "Red Hat OpenShift Container Platform 4",
          "vendor": "Red Hat"
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "`openvt -u` is intended to identify the owner of the current VT and then execute `login` as that user from a privileged context. In the documented `kbrequest`/init usage, the ownership test in `authenticate_user()` relies on `stat(\"/proc/\u003cpid\u003e/fd/0\")`. `stat()` on `/proc/\u003cpid\u003e/fd/0` follows the symlink to the underlying TTY device node. As a result, `buf.st_uid` reflects the owner of the TTY node rather than the owner of the process holding the file descriptor. If the TTY owner returns to `root` or the getty owner after logout while an unprivileged process still has `fd 0` attached to that TTY, the check can incorrectly treat that process as belonging to the privileged console owner. Once that check succeeds, the `-u` path executes a passwordless login as the selected user. In the documented `kbrequest`/init deployment using `openvt -us`, this can result in passwordless `login -f root` on the spawned VT. This report establishes that privilege escalation path for that documented deployment; it does not claim equivalent reachability for deployments that do not use `openvt -u` from a privileged `kbrequest`/init path."
    }
  ],
  "id": "CVE-2026-72693",
  "lastModified": "2026-10-09T04:18:12.403",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-72693",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-11T17:44:26.656399Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-11T09:17:14.340",
  "references": [
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:41136"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:57597"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:57610"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:60440"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:66357"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:78951"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/security/cve/CVE-2026-72693"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2462115"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    }
  ]
}

GHSA-6766-CX7R-C5Q6

Vulnerability from github – Published: 2026-08-11 09:32 – Updated: 2026-10-09 06:31

Details

openvt -u is intended to identify the owner of the current VT and then execute login as that user from a privileged context. In the documented kbrequest/init usage, the ownership test in authenticate_user() relies on stat("/proc/<pid>/fd/0"). stat() on /proc/<pid>/fd/0 follows the symlink to the underlying TTY device node. As a result, buf.st_uid reflects the owner of the TTY node rather than the owner of the process holding the file descriptor. If the TTY owner returns to root or the getty owner after logout while an unprivileged process still has fd 0 attached to that TTY, the check can incorrectly treat that process as belonging to the privileged console owner. Once that check succeeds, the -u path executes a passwordless login as the selected user. In the documented kbrequest/init deployment using openvt -us, this can result in passwordless login -f root on the spawned VT. This report establishes that privilege escalation path for that documented deployment; it does not claim equivalent reachability for deployments that do not use openvt -u from a privileged kbrequest/init path.

Severity

7.8 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-72693"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-11T09:17:14Z",
    "severity": "HIGH"
  },
  "details": "`openvt -u` is intended to identify the owner of the current VT and then execute `login` as that user from a privileged context. In the documented `kbrequest`/init usage, the ownership test in `authenticate_user()` relies on `stat(\"/proc/\u003cpid\u003e/fd/0\")`. `stat()` on `/proc/\u003cpid\u003e/fd/0` follows the symlink to the underlying TTY device node. As a result, `buf.st_uid` reflects the owner of the TTY node rather than the owner of the process holding the file descriptor. If the TTY owner returns to `root` or the getty owner after logout while an unprivileged process still has `fd 0` attached to that TTY, the check can incorrectly treat that process as belonging to the privileged console owner. Once that check succeeds, the `-u` path executes a passwordless login as the selected user. In the documented `kbrequest`/init deployment using `openvt -us`, this can result in passwordless `login -f root` on the spawned VT. This report establishes that privilege escalation path for that documented deployment; it does not claim equivalent reachability for deployments that do not use `openvt -u` from a privileged `kbrequest`/init path.",
  "id": "GHSA-6766-cx7r-c5q6",
  "modified": "2026-10-09T06:31:13Z",
  "published": "2026-08-11T09:32:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72693"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:41136"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:57597"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:57610"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60440"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:66357"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:78951"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-72693"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2462115"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-72693

Vulnerability from csaf_microsoft - Published: 2026-08-23 14:56 - Updated: 2026-08-23 14:56

Summary

Kbd: local privilege escalation in openvt via incorrect process owner verification allowing passwordless root login

Scope

1 vulnerability in this advisory, including CVE-2026-72693.

CVE-2026-72693

7.8 (High)


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

Fixed: 1 product Known affected: 1 product

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

Open the full advisory

OESA-2026-3505 (CVE-2026-72693)

Vulnerability from osv_openeuler – Published: 2026-08-30 04:14 – Updated: 2026-08-30 04:14 – Source website

Summary

kbd security update

Details

The project contains tools for managing Linux console ,including Linux console,virtual terminals, keyboard, etc, mainly, what they do is loading console fonts and keyboard maps.

Security Fix(es):

Severity

7.8 (High)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-72693	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "kbd-2.2.0-4.oe2003sp4.aarch64.rpm",
          "kbd-debuginfo-2.2.0-4.oe2003sp4.aarch64.rpm",
          "kbd-debugsource-2.2.0-4.oe2003sp4.aarch64.rpm"
        ],
        "noarch": [
          "kbd-help-2.2.0-4.oe2003sp4.noarch.rpm",
          "kbd-legacy-2.2.0-4.oe2003sp4.noarch.rpm",
          "kbd-misc-2.2.0-4.oe2003sp4.noarch.rpm"
        ],
        "src": [
          "kbd-2.2.0-4.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "kbd-2.2.0-4.oe2003sp4.x86_64.rpm",
          "kbd-debuginfo-2.2.0-4.oe2003sp4.x86_64.rpm",
          "kbd-debugsource-2.2.0-4.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "kbd",
        "purl": "pkg:rpm/openEuler/kbd\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.2.0-4.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "kbd-2.5.1-3.oe2203sp4.aarch64.rpm",
          "kbd-debuginfo-2.5.1-3.oe2203sp4.aarch64.rpm",
          "kbd-debugsource-2.5.1-3.oe2203sp4.aarch64.rpm"
        ],
        "noarch": [
          "kbd-help-2.5.1-3.oe2203sp4.noarch.rpm",
          "kbd-legacy-2.5.1-3.oe2203sp4.noarch.rpm",
          "kbd-misc-2.5.1-3.oe2203sp4.noarch.rpm"
        ],
        "src": [
          "kbd-2.5.1-3.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "kbd-2.5.1-3.oe2203sp4.x86_64.rpm",
          "kbd-debuginfo-2.5.1-3.oe2203sp4.x86_64.rpm",
          "kbd-debugsource-2.5.1-3.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "kbd",
        "purl": "pkg:rpm/openEuler/kbd\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.5.1-3.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "kbd-2.6.1-3.oe2403sp1.aarch64.rpm",
          "kbd-debuginfo-2.6.1-3.oe2403sp1.aarch64.rpm",
          "kbd-debugsource-2.6.1-3.oe2403sp1.aarch64.rpm"
        ],
        "noarch": [
          "kbd-help-2.6.1-3.oe2403sp1.noarch.rpm",
          "kbd-legacy-2.6.1-3.oe2403sp1.noarch.rpm",
          "kbd-misc-2.6.1-3.oe2403sp1.noarch.rpm"
        ],
        "src": [
          "kbd-2.6.1-3.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "kbd-2.6.1-3.oe2403sp1.x86_64.rpm",
          "kbd-debuginfo-2.6.1-3.oe2403sp1.x86_64.rpm",
          "kbd-debugsource-2.6.1-3.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "kbd",
        "purl": "pkg:rpm/openEuler/kbd\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.6.1-3.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "kbd-2.6.1-3.oe2403sp3.aarch64.rpm",
          "kbd-debuginfo-2.6.1-3.oe2403sp3.aarch64.rpm",
          "kbd-debugsource-2.6.1-3.oe2403sp3.aarch64.rpm"
        ],
        "noarch": [
          "kbd-help-2.6.1-3.oe2403sp3.noarch.rpm",
          "kbd-legacy-2.6.1-3.oe2403sp3.noarch.rpm",
          "kbd-misc-2.6.1-3.oe2403sp3.noarch.rpm"
        ],
        "src": [
          "kbd-2.6.1-3.oe2403sp3.src.rpm"
        ],
        "x86_64": [
          "kbd-2.6.1-3.oe2403sp3.x86_64.rpm",
          "kbd-debuginfo-2.6.1-3.oe2403sp3.x86_64.rpm",
          "kbd-debugsource-2.6.1-3.oe2403sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP3",
        "name": "kbd",
        "purl": "pkg:rpm/openEuler/kbd\u0026distro=openEuler-24.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.6.1-3.oe2403sp3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "kbd-2.6.1-3.oe2403sp4.aarch64.rpm",
          "kbd-debuginfo-2.6.1-3.oe2403sp4.aarch64.rpm",
          "kbd-debugsource-2.6.1-3.oe2403sp4.aarch64.rpm"
        ],
        "noarch": [
          "kbd-help-2.6.1-3.oe2403sp4.noarch.rpm",
          "kbd-legacy-2.6.1-3.oe2403sp4.noarch.rpm",
          "kbd-misc-2.6.1-3.oe2403sp4.noarch.rpm"
        ],
        "src": [
          "kbd-2.6.1-3.oe2403sp4.src.rpm"
        ],
        "x86_64": [
          "kbd-2.6.1-3.oe2403sp4.x86_64.rpm",
          "kbd-debuginfo-2.6.1-3.oe2403sp4.x86_64.rpm",
          "kbd-debugsource-2.6.1-3.oe2403sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP4",
        "name": "kbd",
        "purl": "pkg:rpm/openEuler/kbd\u0026distro=openEuler-24.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.6.1-3.oe2403sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "The  project contains tools for managing Linux console ,including  Linux console,virtual terminals, keyboard, etc, mainly, what they do  is loading console fonts and keyboard maps.\r\n\r\nSecurity Fix(es):\n\n`openvt -u` is intended to identify the owner of the current VT and then execute `login` as that user from a privileged context. In the documented `kbrequest`/init usage, the ownership test in `authenticate_user()` relies on `stat(\u0026quot;/proc/\u0026lt;pid\u0026gt;/fd/0\u0026quot;)`. `stat()` on `/proc/\u0026lt;pid\u0026gt;/fd/0` follows the symlink to the underlying TTY device node. As a result, `buf.st_uid` reflects the owner of the TTY node rather than the owner of the process holding the file descriptor. If the TTY owner returns to `root` or the getty owner after logout while an unprivileged process still has `fd 0` attached to that TTY, the check can incorrectly treat that process as belonging to the privileged console owner. Once that check succeeds, the `-u` path executes a passwordless login as the selected user. In the documented `kbrequest`/init deployment using `openvt -us`, this can result in passwordless `login -f root` on the spawned VT.(CVE-2026-72693)",
  "id": "OESA-2026-3505",
  "modified": "2026-08-30T04:14:24Z",
  "published": "2026-08-30T04:14:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3505"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72693"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "kbd security update",
  "upstream": [
    "CVE-2026-72693"
  ]
}

OPENSUSE-SU-2026:21939-1

Vulnerability from csaf_opensuse - Published: 2026-09-23 19:45 - Updated: 2026-09-25 16:51

Summary

Security update for kbd

Severity

Important

Scope

1 vulnerability in this advisory, including CVE-2026-72693.

CVE-2026-72693

7.8 (High)


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

Recommended: 21 products

Open the full advisory

RHSA-2026:57597

Vulnerability from csaf_opensuse - Published: 2026-08-20 17:47 - Updated: 2026-10-09 03:46

Summary

Red Hat Security Advisory: kbd security update

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2026-72693.

CVE-2026-72693

7.8 (High)


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

Fixed: 15 products

https://access.redhat.com/errata/RHSA-2026:57597

Open the full advisory

RHSA-2026:41136

Vulnerability from csaf_redhat - Published: 2026-07-16 23:21 - Updated: 2026-10-09 03:46

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2026-72693.

CVE-2026-72693

7.8 (High)


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

Fixed: 7 products

https://access.redhat.com/errata/RHSA-2026:41136

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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-2026-72693 (GCVE-0-2026-72693)

OESA-2026-3505 (CVE-2026-72693)

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