Medium
Security advisory
It was found that the fix for CVE-2017-7500 and CVE-2017-7501 was incomplete: the check was only implemented for the parent directory of the file to be created. A local unprivileged user who owns another ancestor directory could potentially use this flaw to gain root privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-35939
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:45 UTC · Revision 1
Source evidence
It was found that the fix for CVE-2017-7500 and CVE-2017-7501 was incomplete: the check was only implemented for the parent directory of the file to be created. A local unprivileged user who owns another ancestor directory could potentially use this flaw to gain root privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
osv:CVE-2021-35939
Complete source record
{
"id": "78bc1c28c35f6736f313be176048e5318a936ff63581ee39eea8656a3541f8eb",
"url": "https://osv.dev/vulnerability/CVE-2021-35939",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-35939",
"summary": "It was found that the fix for CVE-2017-7500 and CVE-2017-7501 was incomplete: the check was only implemented for the parent directory of the file to be created. A local unprivileged user who owns another ancestor directory could potentially use this flaw to gain root privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",
"evidence": "osv:CVE-2021-35939",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2021-35939",
"aliases": [
"CVE-2021-35939"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/rpm-software-management/rpm",
"type": "GIT",
"events": [
{
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},
{
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},
{
"fixed": "96ec957e281220f8e137a2d5eb23b83a6377d556"
}
],
"database_specific": {
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{
"cpe": "cpe:2.3:a:rpm:rpm:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.18"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
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}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"rpm-4.17.0-alpha",
"rpm-4.16.0-alpha",
"rpm-4.15.0-alpha",
"rpm-4.13.0-alpha",
"rpm-4.12.0-alpha",
"rpm-4.11.0-alpha",
"rpm-4.8.0-beta1",
"rpm-4.4.2.1-rc2",
"rpm-4.4.2.1-rc1",
"rpm-4.4.2-release",
"rpm-4.4.1-release",
"rpm-4.4-release"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-35939.json",
"vanir_signatures": [
{
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"digest": {
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"function_hash": "51856694465730866450330405833723620433"
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"source": "https://github.com/rpm-software-management/rpm/commit/96ec957e281220f8e137a2d5eb23b83a6377d556",
"target": {
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"function": "fsmMkdir"
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"signature_type": "Function",
"signature_version": "v1"
},
{
"id": "CVE-2021-35939-92eaef60",
"digest": {
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"source": "https://github.com/rpm-software-management/rpm/commit/96ec957e281220f8e137a2d5eb23b83a6377d556",
"target": {
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"function": "fsmMkdirs"
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"signature_type": "Function",
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{
"id": "CVE-2021-35939-acb47abe",
"digest": {
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"source": "https://github.com/rpm-software-management/rpm/commit/96ec957e281220f8e137a2d5eb23b83a6377d556",
"target": {
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},
"deprecated": false,
"signature_type": "Line",
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{
"id": "CVE-2021-35939-dd9ca3d6",
"digest": {
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"source": "https://github.com/rpm-software-management/rpm/commit/96ec957e281220f8e137a2d5eb23b83a6377d556",
"target": {
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"function": "rpmPackageFilesInstall"
},
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"signature_type": "Function",
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}
],
"vanir_signatures_modified": "2026-10-20T14:25:24Z"
}
}
],
"modified": "2026-10-20T14:25:24.769588824Z",
"provider": "osv",
"references": [
"https://access.redhat.com/security/cve/CVE-2021-35939",
"https://rpm.org/wiki/Releases/4.18.0",
"https://security.gentoo.org/glsa/202210-22",
"https://bugzilla.redhat.com/show_bug.cgi?id=1964129",
"https://github.com/rpm-software-management/rpm/commit/96ec957e281220f8e137a2d5eb23b83a6377d556",
"https://github.com/rpm-software-management/rpm/pull/1919"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux",
"extracted_events": [
{
"range": [
{
"introduced": "8.0"
},
{
"last_affected": "8.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2021-35939",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 388982,
"published_at": "2022-08-26T16:15:08.683+00:00"
}