Medium
Security advisory
A flaw was found in the way Samba handled file/directory metadata. This flaw allows an authenticated attacker with permissions to read or modify share metadata, to perform this operation outside of the share.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-20316
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 06:25 UTC · Revision 1
Source evidence
A flaw was found in the way Samba handled file/directory metadata. This flaw allows an authenticated attacker with permissions to read or modify share metadata, to perform this operation outside of the share.
osv:CVE-2021-20316
Complete source record
{
"id": "451dfef534f789c94d7786aebf577af9360c58d2bba58297f5e6aa6757a08494",
"url": "https://osv.dev/vulnerability/CVE-2021-20316",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-20316",
"summary": "A flaw was found in the way Samba handled file/directory metadata. This flaw allows an authenticated attacker with permissions to read or modify share metadata, to perform this operation outside of the share.",
"evidence": "osv:CVE-2021-20316",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2021-20316",
"aliases": [
"CVE-2021-20316"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/samba-team/samba",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "fc8342bd26d1c55ca5780b427f675f31147b27f9"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.15.0"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"samba-4.15.0rc7",
"samba-4.15.0rc6",
"samba-4.15.0rc5",
"samba-4.15.0rc4",
"samba-4.15.0rc3",
"samba-4.15.0rc2",
"samba-4.15.0rc1",
"ldb-2.4.0",
"tdb-1.4.4",
"talloc-2.3.3",
"tevent-0.11.0",
"samba-4.14.0rc1",
"talloc-2.3.2",
"samba-4.13.0rc1",
"ldb-2.2.0",
"ldb-2.1.1",
"samba-4.12.0rc1",
"ldb-2.1.0",
"tevent-0.10.2",
"tdb-1.4.3",
"talloc-2.3.1",
"tevent-0.10.1",
"tdb-1.4.2",
"talloc-2.3.0",
"samba-4.11.0rc1",
"ldb-2.0.5",
"tdb-1.4.1",
"ldb-1.6.3",
"tevent-0.10.0",
"talloc-2.2.0",
"tdb-1.4.0",
"ldb-1.6.2",
"tevent-0.9.39",
"talloc-2.1.16",
"tdb-1.3.18",
"ldb-1.6.1",
"samba-4.10.0rc1",
"ldb-1.5.2",
"tevent-0.9.38",
"talloc-2.1.15",
"tdb-1.3.17",
"ldb-1.5.1",
"ldb-1.5.0",
"samba-4.9.0rc1",
"ldb-1.4.1",
"talloc-2.1.14",
"tdb-1.3.16",
"tevent-0.9.37",
"ldb-1.4.0",
"talloc-2.1.13",
"talloc-2.1.12",
"ldb-1.3.2",
"tevent-0.9.36",
"samba-4.8.0rc1",
"ldb-1.3.1",
"tevent-0.9.35",
"talloc-2.1.11",
"tevent-0.9.34",
"ldb-1.3.0",
"ldb-1.2.2",
"tdb-1.3.15",
"ldb-1.2.1",
"tevent-0.9.33",
"talloc-2.1.10",
"samba-4.7.0rc1",
"ldb-1.2.0",
"tdb-1.3.14",
"tevent-0.9.32",
"ldb-1.1.31",
"ldb-1.1.30",
"tdb-1.3.13",
"talloc-2.1.9",
"samba-4.6.0rc1",
"ldb-1.1.29",
"tdb-1.3.12",
"ldb-1.1.28",
"tevent-0.9.31",
"tdb-1.3.11",
"tevent-0.9.30",
"samba-4.5.0rc1",
"ldb-1.1.27",
"tevent-0.9.29",
"talloc-2.1.8",
"tdb-1.3.10",
"talloc-2.1.7",
"tdb-1.3.9",
"talloc-2.1.6",
"tevent-0.9.28",
"ldb-1.1.26",
"tevent-0.9.27",
"samba-4.4.0rc1",
"ldb-1.1.25",
"ldb-1.1.23",
"talloc-2.1.5",
"tdb-1.3.8",
"tevent-0.9.26",
"ldb-1.1.22",
"talloc-2.1.4",
"samba-4.3.0rc1",
"ldb-1.1.21",
"tdb-1.3.7",
"talloc-2.1.3",
"tdb-1.3.6",
"tevent-0.9.25",
"tdb-1.3.5",
"talloc-2.1.2",
"tevent-0.9.24",
"tevent-0.9.23",
"ldb-1.1.20",
"ldb-1.1.19",
"tdb-1.3.4",
"tdb-1.3.3",
"ldb-1.1.18",
"tdb-1.3.2",
"samba-4.2.0rc1",
"tevent-0.9.22",
"tdb-1.3.1",
"tdb-1.3.0",
"talloc-2.1.1",
"ldb-1.1.17",
"tdb-1.2.13",
"tevent-0.9.21",
"tevent-0.9.20",
"talloc-2.1.0",
"tevent-0.9.19",
"ldb-1.1.16",
"tdb-1.2.12",
"tevent-0.9.18",
"ldb-1.1.15",
"ldb-1.1.14",
"tdb-1.2.11",
"talloc-2.0.8",
"samba-4.0.0rc1",
"ldb-1.1.13",
"samba-4.0.0beta8",
"ldb-1.1.12",
"ldb-1.1.11",
"samba-4.0.0beta7",
"tevent-0.9.17",
"samba-4.0.0beta6",
"ldb-1.1.10",
"ldb-1.1.9",
"samba-4.0.0beta5",
"samba-4.0.0beta4",
"ldb-1.1.8",
"samba-4.0.0beta3",
"samba-4.0.0beta2",
"tevent-0.9.16",
"samba-4.0.0beta1",
"samba-4.0.0alpha21",
"samba-4.0.0alpha20",
"ldb-1.1.6",
"samba-4.0.0alpha19",
"ldb-1.1.5",
"tdb-1.2.10",
"samba-4.0.0alpha18",
"tevent-0.9.15",
"ldb-1.1.4",
"ldb-1.1.3",
"talloc-2.0.7",
"samba-4.0.0alpha17",
"tevent-0.9.14",
"ldb-1.1.2",
"tevent-0.9.13",
"tevent-0.9.12",
"ldb-1.1.0",
"tevent-0.9.11",
"tdb-1.2.1",
"samba-4.0.0alpha10",
"samba-4.0.0alpha9",
"tdb-1.2.0",
"tevent-0.9.8",
"talloc-2.0.0",
"samba-4.0.0alpha8",
"talloc-1.3.1",
"tdb-1.1.5",
"samba-4.0.0alpha7",
"samba-4.0.0alpha6"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-20316.json"
}
}
],
"modified": "2026-10-24T10:30:39.270520785Z",
"provider": "osv",
"references": [
"https://access.redhat.com/security/cve/CVE-2021-20316",
"https://security-tracker.debian.org/tracker/CVE-2021-20316",
"https://security.gentoo.org/glsa/202309-06",
"https://www.samba.org/samba/security/CVE-2021-20316.html",
"https://bugzilla.redhat.com/show_bug.cgi?id=2009673",
"https://bugzilla.samba.org/show_bug.cgi?id=14842"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "10.0"
},
{
"last_affected": "10.0"
},
{
"introduced": "11.0"
},
{
"last_affected": "11.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"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"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_aus:8.6:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_aus",
"extracted_events": [
{
"range": [
{
"introduced": "8.6"
},
{
"last_affected": "8.6"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_eus:8.6:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_eus",
"extracted_events": [
{
"range": [
{
"introduced": "8.6"
},
{
"last_affected": "8.6"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_tus:8.6:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_tus",
"extracted_events": [
{
"range": [
{
"introduced": "8.6"
},
{
"last_affected": "8.6"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:a:redhat:virtualization_host:4.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:virtualization_host",
"extracted_events": [
{
"range": [
{
"introduced": "4.0"
},
{
"last_affected": "4.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2021-20316",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 434628,
"published_at": "2022-08-23T16:15:09.147+00:00"
}