CVE-2026-88264 (GCVE-0-2026-88264)
Vulnerability from cvelistv5 – Published: 2026-09-10 08:40 – Updated: 2026-09-10 08:40
VLAI
EPSS
VEX
Title
Crun: crun: /dev/console symlink follow allows root-owned file creation outside the rootfs
Summary
A flaw was found in crun. When the container configuration does not give /dev a dedicated mount, terminal setup can redirect /dev/console onto an attacker-controlled path, including via the read-only-rootfs bind-mount fallback. Affected versions are crun 1.29.1 and earlier. Default configurations that mount a fresh /dev are not exposed. No fixed release is available yet.
Severity
5.6 (Medium)
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-88264 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2531223 | issue-trackingx_refsource_REDHAT |
| https://github.com/containers/crun/ |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Red Hat | Red Hat Hardened Images |
cpe:/a:redhat:hummingbird:1
|
Date Public
2026-09-10 00:00
{
"containers": {
"cna": {
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"cpes": [
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"packageName": "crun",
"product": "Red Hat Hardened Images",
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}
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"baseScore": 5.6,
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"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
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"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N",
"version": "3.1"
},
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"problemTypes": [
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"descriptions": [
{
"cweId": "CWE-59",
"description": "Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
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"references": [
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],
"url": "https://access.redhat.com/security/cve/CVE-2026-88264"
},
{
"name": "RHBZ#2531223",
"tags": [
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],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2531223"
},
{
"url": "https://github.com/containers/crun/"
}
],
"timeline": [
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"time": "2026-09-10T01:26:53.552Z",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2026-09-10T00:00:00.000Z",
"value": "Made public."
}
],
"title": "Crun: crun: /dev/console symlink follow allows root-owned file creation outside the rootfs",
"workarounds": [
{
"lang": "en",
"value": "Always mount /dev (Podman/crun default). Do not run untrusted images with a /dev-less config."
}
],
"x_generator": {
"engine": "cvelib 1.8.0"
},
"x_redhatCweChain": "CWE-59: Improper Link Resolution Before File Access (\u0027Link Following\u0027)"
}
},
"cveMetadata": {
"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"assignerShortName": "redhat",
"cveId": "CVE-2026-88264",
"datePublished": "2026-09-10T08:40:36.527Z",
"dateReserved": "2026-09-10T01:57:15.157Z",
"dateUpdated": "2026-09-10T08:40:36.527Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-88264\",\"sourceIdentifier\":\"secalert@redhat.com\",\"published\":\"2026-09-10T09:17:03.397\",\"lastModified\":\"2026-09-10T09:17:03.397\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A flaw was found in crun. When the container configuration does not give /dev a dedicated mount, terminal setup can redirect /dev/console onto an attacker-controlled path, including via the read-only-rootfs bind-mount fallback. Affected versions are crun 1.29.1 and earlier. Default configurations that mount a fresh /dev are not exposed. No fixed release is available yet.\"}],\"affected\":[{\"source\":\"secalert@redhat.com\",\"affectedData\":[{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Hardened Images\",\"defaultStatus\":\"affected\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"crun\",\"cpes\":[\"cpe:/a:redhat:hummingbird:1\"]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"secalert@redhat.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N\",\"baseScore\":5.6,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.1,\"impactScore\":4.0}]},\"weaknesses\":[{\"source\":\"secalert@redhat.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-59\"}]}],\"references\":[{\"url\":\"https://access.redhat.com/security/cve/CVE-2026-88264\",\"source\":\"secalert@redhat.com\"},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=2531223\",\"source\":\"secalert@redhat.com\"},{\"url\":\"https://github.com/containers/crun/\",\"source\":\"secalert@redhat.com\"}]}}",
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-09-10T09:06:38+00:00",
"cve": "CVE-2026-88264",
"id": "CVE-2026-88264",
"initial_release_date": "2026-09-10T00:00:00+00:00",
"product_status:known_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "crun: crun: /dev/console symlink follow allows root-owned file creation outside the rootfs",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88264.json",
"version": "3"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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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.
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.
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