Medium
Security advisory
An assertion failure issue was found in the Network Block Device(NBD) Server in all QEMU versions before QEMU 5.0.1. This flaw occurs when an nbd-client sends a spec-compliant request that is near the boundary of maximum permitted request length. A remote nbd-client could use this flaw to crash the qemu-nbd server resulting in a denial of service.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-10761
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:56 UTC · Revision 1
Source evidence
An assertion failure issue was found in the Network Block Device(NBD) Server in all QEMU versions before QEMU 5.0.1. This flaw occurs when an nbd-client sends a spec-compliant request that is near the boundary of maximum permitted request length. A remote nbd-client could use this flaw to crash the qemu-nbd server resulting in a denial of service.
osv:CVE-2020-10761
Complete source record
{
"id": "55126997ee1028380efa8dcdee6d1dee1da4944ea00bf5cc2d24995a17322d0f",
"url": "https://osv.dev/vulnerability/CVE-2020-10761",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-10761",
"summary": "An assertion failure issue was found in the Network Block Device(NBD) Server in all QEMU versions before QEMU 5.0.1. This flaw occurs when an nbd-client sends a spec-compliant request that is near the boundary of maximum permitted request length. A remote nbd-client could use this flaw to crash the qemu-nbd server resulting in a denial of service.",
"evidence": "osv:CVE-2020-10761",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2020-10761",
"aliases": [
"CVE-2020-10761"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L"
}
],
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{
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],
"modified": "2026-10-24T10:30:23.309520737Z",
"provider": "osv",
"references": [
"https://security.gentoo.org/glsa/202011-09",
"https://security.netapp.com/advisory/ntap-20200731-0001/",
"https://usn.ubuntu.com/4467-1/",
"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10761",
"https://www.openwall.com/lists/oss-security/2020/06/09/1"
],
"provider_metadata": {
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},
"related_cves": [
{
"value": "CVE-2020-10761",
"evidence": "/id"
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"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 430884,
"published_at": "2020-06-09T13:15:10.493+00:00"
}