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vuln-cve/data/2026/72xxx/CVE-2026-72693.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-72693",
"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"state": "PUBLISHED",
"assignerShortName": "redhat",
"dateReserved": "2026-08-10T12:35:16.746Z",
"datePublished": "2026-08-11T08:39:24.983Z",
"dateUpdated": "2026-11-05T22:41:05.928Z"
},
"containers": {
"cna": {
"title": "Kbd: local privilege escalation in openvt via incorrect process owner verification allowing passwordless root login",
"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": 7.8,
"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"
}
],
"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/<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."
}
],
"affected": [
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 10",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "kbd",
"defaultStatus": "affected",
"versions": [
{
"version": "0:2.6.4-8.el10_2",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
],
"cpes": [
"cpe:/o:redhat:enterprise_linux:10.2"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "kbd",
"defaultStatus": "affected",
"versions": [
{
"version": "0:2.0.4-11.el8_10.1",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
],
"cpes": [
"cpe:/o:redhat:enterprise_linux:8::baseos"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "kbd",
"defaultStatus": "affected",
"versions": [
{
"version": "0:2.4.0-12.el9_8",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
],
"cpes": [
"cpe:/o:redhat:enterprise_linux:9::baseos"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 4.22",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "openshift/ose-rhel-coreos-9",
"defaultStatus": "affected",
"versions": [
{
"version": "4.22.9.8.202608251819-0",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
],
"cpes": [
"cpe:/a:redhat:openshift:4.22::el9"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 4.22",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "openshift/ose-rhel-coreos-9",
"defaultStatus": "affected",
"versions": [
{
"version": "4.22.9.8.202609081748-0",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
],
"cpes": [
"cpe:/a:redhat:openshift:4.22::el9"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Hardened Images",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "kbd-main",
"defaultStatus": "affected",
"versions": [
{
"version": "2.10.0-2.hum1",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
],
"cpes": [
"cpe:/a:redhat:hummingbird:1"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 6",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "kbd",
"defaultStatus": "unknown",
"cpes": [
"cpe:/o:redhat:rhel_els:6"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 7",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "kbd",
"defaultStatus": "affected",
"cpes": [
"cpe:/o:redhat:rhel_els:7"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 4",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "openshift/ose-rhel-coreos-8",
"defaultStatus": "affected",
"cpes": [
"cpe:/a:redhat:openshift:4"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 5",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "openshift/ose-rhel-coreos-9",
"defaultStatus": "affected",
"cpes": [
"cpe:/a:redhat:openshift:5"
]
}
],
"references": [
{
"url": "https://access.redhat.com/errata/RHSA-2026:41136",
"name": "RHSA-2026:41136",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
]
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:57597",
"name": "RHSA-2026:57597",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
]
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:57610",
"name": "RHSA-2026:57610",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
]
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:60440",
"name": "RHSA-2026:60440",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
]
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:66357",
"name": "RHSA-2026:66357",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
]
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:78951",
"name": "RHSA-2026:78951",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
]
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-72693",
"tags": [
"vdb-entry",
"x_refsource_REDHAT"
]
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2462115",
"name": "RHBZ#2462115",
"tags": [
"issue-tracking",
"x_refsource_REDHAT"
]
}
],
"datePublic": "2026-08-11T06:58:59.200Z",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-284",
"description": "Improper Access Control",
"lang": "en",
"type": "CWE"
}
]
}
],
"x_redhatCweChain": "CWE-284: Improper Access Control",
"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."
}
],
"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."
}
],
"credits": [
{
"lang": "en",
"value": "This issue was discovered by Found by AISLE in partnership with Red Hat."
}
],
"providerMetadata": {
"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"shortName": "redhat",
"dateUpdated": "2026-11-05T22:41:05.928Z"
},
"x_generator": {
"engine": "cvelib 1.8.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-08-11T17:44:26.656399Z",
"id": "CVE-2026-72693",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-08-11T17:51:17.406Z"
}
}
]
}
}
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