Medium
Security advisory
A key length flaw was found in Red Hat Ceph Storage. An attacker can exploit the fact that the key length is incorrectly passed in an encryption algorithm to create a non random key, which is weaker and can be exploited for loss of confidentiality and integrity on encrypted disks.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-3979
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:54 UTC · Revision 1
Source evidence
A key length flaw was found in Red Hat Ceph Storage. An attacker can exploit the fact that the key length is incorrectly passed in an encryption algorithm to create a non random key, which is weaker and can be exploited for loss of confidentiality and integrity on encrypted disks.
osv:CVE-2021-3979
Complete source record
{
"id": "e47c629ed5b5003596e48b50be439605c2228eafdca16ea181d0ab3716713b28",
"url": "https://osv.dev/vulnerability/CVE-2021-3979",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-3979",
"summary": "A key length flaw was found in Red Hat Ceph Storage. An attacker can exploit the fact that the key length is incorrectly passed in an encryption algorithm to create a non random key, which is weaker and can be exploited for loss of confidentiality and integrity on encrypted disks.",
"evidence": "osv:CVE-2021-3979",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2021-3979",
"aliases": [
"CVE-2021-3979"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/ceph/ceph",
"type": "GIT",
"events": [
{
"introduced": "457c145aefd30a852f525fbf76a871f676502c0a"
},
{
"last_affected": "457c145aefd30a852f525fbf76a871f676502c0a"
},
{
"fixed": "47c33179f9a15ae95cc1579a421be89378602656"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "13.0"
},
{
"last_affected": "13.0"
}
],
"source": "CPE_STRING"
},
{
"range": [
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}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"13.0",
"v13.0.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3979.json"
}
}
],
"modified": "2026-10-20T10:54:54.763185706Z",
"provider": "osv",
"references": [
"https://lists.debian.org/debian-lts-announce/2023/10/msg00034.html",
"https://lists.debian.org/debian-lts-announce/2025/09/msg00025.html",
"https://access.redhat.com/security/cve/CVE-2021-3979",
"https://bugzilla.redhat.com/show_bug.cgi?id=2024788",
"https://tracker.ceph.com/issues/54006",
"https://github.com/ceph/ceph/commit/47c33179f9a15ae95cc1579a421be89378602656",
"https://github.com/ceph/ceph/pull/44765",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BPOK44BESMIFW6BIOGCN452AKKOIIT6Q/"
],
"provider_metadata": {
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"cpes": [
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"cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
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"introduced": "35"
},
{
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},
{
"introduced": "37"
},
{
"last_affected": "37"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
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"cpe:2.3:a:redhat:ceph_storage:4.3:*:*:*:*:*:*:*",
"cpe:2.3:a:redhat:ceph_storage:5.0:*:*:*:*:*:*:*",
"cpe:2.3:a:redhat:ceph_storage:5.1:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:ceph_storage",
"extracted_events": [
{
"range": [
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"introduced": "3.0"
},
{
"last_affected": "3.0"
},
{
"introduced": "4.3"
},
{
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},
{
"introduced": "5.1"
},
{
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},
{
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},
{
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{
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{
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{
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}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:ceph_storage_for_ibm_z_systems:4.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:ceph_storage_for_ibm_z_systems",
"extracted_events": [
{
"range": [
{
"introduced": "4.0"
},
{
"last_affected": "4.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:a:redhat:ceph_storage_for_power:4.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:ceph_storage_for_power",
"extracted_events": [
{
"range": [
{
"introduced": "4.0"
},
{
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},
{
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},
{
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}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:a:redhat:openshift_container_storage:4.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:openshift_container_storage",
"extracted_events": [
{
"range": [
{
"introduced": "4.0"
},
{
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}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:a:redhat:openshift_data_foundation:4.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:openshift_data_foundation",
"extracted_events": [
{
"range": [
{
"introduced": "4.0"
},
{
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}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2021-3979",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 386449,
"published_at": "2022-08-25T20:15:09.473+00:00"
}