Medium
Security advisory
A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit access control driver. Specifically, clients connecting to the read-write socket with limited ACL permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or potentially escalate their privileges on the system. 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-2020-25637
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 06:10 UTC · Revision 1
Source evidence
A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit access control driver. Specifically, clients connecting to the read-write socket with limited ACL permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or potentially escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
osv:CVE-2020-25637
Complete source record
{
"id": "c9e6cfe3ed4ad2183bf2ec4c3328c528ac46ac5f9635c1dcd5864c7afce5b1e4",
"url": "https://osv.dev/vulnerability/CVE-2020-25637",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-25637",
"summary": "A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit access control driver. Specifically, clients connecting to the read-write socket with limited ACL permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or potentially escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",
"evidence": "osv:CVE-2020-25637",
"products": [],
"severity": "medium",
"structured": {
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"aliases": [
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"metrics": [
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"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
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"CVE-2015-0236",
"CVE-2015-0236-1",
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"CVE-2014-8131-2",
"v1.2.11-rc2",
"CVE-2014-8131-1",
"CVE-2014-8131",
"CVE-2014-8136",
"v1.2.11-rc1",
"CVE-2014-8135",
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"v1.2.9",
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-25637.json"
}
}
],
"modified": "2026-10-24T10:30:36.278589397Z",
"provider": "osv",
"references": [
"https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html",
"https://security.gentoo.org/glsa/202210-06",
"https://bugzilla.redhat.com/show_bug.cgi?id=1881037"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*",
"cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*"
],
"vendor_product": "opensuse:leap",
"extracted_events": [
{
"range": [
{
"introduced": "15.1"
},
{
"last_affected": "15.1"
},
{
"introduced": "15.2"
},
{
"last_affected": "15.2"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2020-25637",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 433926,
"published_at": "2020-10-06T14:15:12.527+00:00"
}