CVE-2026-15809
Full vulnerability record from the local CVENow database.
Description
A flaw was found in CRI-O. The fix for a previous vulnerability (CVE-2022-4318) was incorrect, allowing it to be bypassed. An attacker capable of setting environment variables on a container can inject a newline character into the HOME environment variable. This issue allows the addition of arbitrary lines into /etc/passwd by use of a specially crafted environment variable.
Severity
HIGH
CVSS score
7.8
(v3.1)
Vulnerability status
Deferred
Source identifier
Published
2026-07-15 13:17:03.933000
Last modified
2026-11-02 18:18:53.770000
View original CVE JSON
{
"id": "CVE-2026-15809",
"sourceIdentifier": "[email protected]",
"published": "2026-07-15T13:17:03.933",
"lastModified": "2026-11-02T18:18:53.770",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in CRI-O. The fix for a previous vulnerability (CVE-2022-4318) was incorrect, allowing it to be bypassed. An attacker capable of setting environment variables on a container can inject a newline character into the HOME environment variable. This issue allows the addition of arbitrary lines into /etc/passwd by use of a specially crafted environment variable."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 4.12",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "cri-o",
"cpes": [
"cpe:/a:redhat:openshift:4.12::el8"
],
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{
"version": "0:1.25.5-36.rhaos4.12.git2e7f657.el8",
"lessThan": "*",
"versionType": "rpm",
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}
]
},
{
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"cpe:/a:redhat:openshift:4.13::el9"
],
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{
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"lessThan": "*",
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}
]
},
{
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],
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{
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}
]
},
{
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{
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}
]
},
{
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],
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{
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}
]
},
{
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"cpes": [
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{
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}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 4.18",
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"packageName": "cri-o",
"cpes": [
"cpe:/a:redhat:openshift:4.18::el8",
"cpe:/a:redhat:openshift:4.18::el9"
],
"versions": [
{
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"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 4.19",
"defaultStatus": "affected",
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"packageName": "cri-o",
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"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 4.20",
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"packageName": "cri-o",
"cpes": [
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],
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{
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"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 4.21",
"defaultStatus": "affected",
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"packageName": "cri-o",
"cpes": [
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],
"versions": [
{
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"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 4.22",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "cri-o",
"cpes": [
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"cpe:/a:redhat:openshift:4.22::el9",
"cpe:/a:redhat:openshift_ironic:4.22::el9"
],
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"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Confidential Compute Attestation",
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"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "openshift-sandboxed-containers/osc-monitor-rhel9",
"cpes": [
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]
},
{
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 4",
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"packageName": "openshift4/cnf-tests-rhel8",
"cpes": [
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]
},
{
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 4",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "openshift4/ztp-site-generate-rhel8",
"cpes": [
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]
},
{
"vendor": "Red Hat",
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"packageName": "cri-o",
"cpes": [
"cpe:/a:redhat:openshift:5"
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-07-15T13:06:08.620102Z",
"id": "CVE-2026-15809",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-134"
}
]
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-116"
}
]
}
],
"references": [
{
"url": "https://access.redhat.com/errata/RHSA-2026:57361",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:60444",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:60449",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:60452",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:62548",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:65838",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:65906",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:66385",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:67836",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:67856",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:70585",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-15809",
"source": "[email protected]"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2500846",
"source": "[email protected]"
},
{
"url": "https://github.com/cri-o/cri-o/pull/6450",
"source": "[email protected]"
},
{
"url": "https://github.com/cri-o/cri-o/pull/6524",
"source": "[email protected]"
}
]
}