Security advisory
An improper file permissions vulnerability affects Kata Containers prior to 1.11.5. When using a Kubernetes hostPath volume and mounting either a file or directory into a container as readonly, the file/directory is mounted as readOnly inside the container, but is still writable inside the guest. For a container breakout situation, a malicious guest can potentially modify or delete files/directories expected to be read-only.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-28914
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:11 UTC · Revision 1
Source evidence
An improper file permissions vulnerability affects Kata Containers prior to 1.11.5. When using a Kubernetes hostPath volume and mounting either a file or directory into a container as readonly, the file/directory is mounted as readOnly inside the container, but is still writable inside the guest. For a container breakout situation, a malicious guest can potentially modify or delete files/directories expected to be read-only.
osv:CVE-2020-28914
Complete source record
{
"id": "f52b851d9598ced910c4e19269ed8f156c49fef2336176a4c5b0a937da51d4e0",
"url": "https://osv.dev/vulnerability/CVE-2020-28914",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-28914",
"summary": "An improper file permissions vulnerability affects Kata Containers prior to 1.11.5. When using a Kubernetes hostPath volume and mounting either a file or directory into a container as readonly, the file/directory is mounted as readOnly inside the container, but is still writable inside the guest. For a container breakout situation, a malicious guest can potentially modify or delete files/directories expected to be read-only.",
"evidence": "osv:CVE-2020-28914",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2020-28914",
"aliases": [
"CVE-2020-28914"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/kata-containers/kata-containers",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "797b6ad65ddd185bb91bb7faf7dca65fb00ae0b6"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:katacontainers:kata-containers:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "1.11.5"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"1.11.4",
"1.11.3",
"1.11.2",
"1.11.1",
"1.11.0",
"1.11.0-rc0",
"1.11.0-alpha1",
"1.11.0-alpha0",
"1.9.3",
"1.10.0-rc0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-28914.json"
}
},
{
"ranges": [
{
"repo": "https://github.com/kata-containers/runtime",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "28598666af4ca4855cc81a9bf829efb9e739b962"
},
{
"fixed": "439d131e706e18018094bca48ae20adfa5d0fb7a"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"fixed": "28598666af4ca4855cc81a9bf829efb9e739b962"
}
],
"source": "REFERENCES_TAG",
"original_tag": "1.11.5"
},
{
"range": [
{
"fixed": "439d131e706e18018094bca48ae20adfa5d0fb7a"
}
],
"source": "REFERENCES_TAG",
"original_tag": "1.12.0"
}
]
}
}
],
"versions": [
"1.12.0-rc0",
"1.11.4",
"1.12.0-alpha1",
"1.11.3",
"1.11.2",
"1.12.0-alpha0",
"1.11.1",
"1.11.0",
"1.11.0-rc0",
"1.11.0-alpha1",
"1.11.0-alpha0",
"1.10.0-rc0",
"20191207",
"1.10.0-alpha1",
"1.10.0-alpha0",
"1.9.0-rc0",
"1.9.0-alpha2",
"1.9.0-alpha1",
"1.9.0-alpha0",
"1.8.0-rc0",
"1.8.0-alpha2",
"1.8.0-alpha1",
"1.8.0-alpha0",
"1.7.0",
"1.7.0-rc1",
"1.7.0-alpha1",
"1.7.0-alpha0",
"1.6.0-rc2",
"1.6.0-rc1",
"1.5.0",
"1.5.0-rc2",
"1.4.0",
"1.5.0-rc1",
"1.3.0",
"1.3.0-rc1",
"1.3.0-rc0",
"1.2.0",
"1.1.0",
"1.0.0",
"0.3.0",
"0.2.0",
"0.0.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-28914.json"
}
}
],
"modified": "2026-10-20T10:53:10.746711678Z",
"provider": "osv",
"references": [
"https://github.com/kata-containers/kata-containers/pull/1062",
"https://github.com/kata-containers/runtime/pull/3042",
"https://github.com/kata-containers/runtime/pull/3051",
"https://github.com/kata-containers/runtime/releases/tag/1.11.5",
"https://github.com/kata-containers/runtime/releases/tag/1.12.0"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2020-28914",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 384219,
"published_at": "2020-11-17T22:15:12.387+00:00"
}