Critical
Security advisory
A stack-based buffer overflow vulnerability was found in NBD server implementation in qemu before 2.11 allowing a client to request an export name of size up to 4096 bytes, which in fact should be limited to 256 bytes, causing an out-of-bounds stack write in the qemu process. If NBD server requires TLS, the attacker cannot trigger the buffer overflow without first successfully negotiating TLS.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2017-15118
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 06:43 UTC · Revision 1
Source evidence
A stack-based buffer overflow vulnerability was found in NBD server implementation in qemu before 2.11 allowing a client to request an export name of size up to 4096 bytes, which in fact should be limited to 256 bytes, causing an out-of-bounds stack write in the qemu process. If NBD server requires TLS, the attacker cannot trigger the buffer overflow without first successfully negotiating TLS.
osv:CVE-2017-15118
Complete source record
{
"id": "3021a6ea0dda39878002a8c14e3e5174c40e3e36c938d5943f5ba11741535f25",
"url": "https://osv.dev/vulnerability/CVE-2017-15118",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2017-15118",
"summary": "A stack-based buffer overflow vulnerability was found in NBD server implementation in qemu before 2.11 allowing a client to request an export name of size up to 4096 bytes, which in fact should be limited to 256 bytes, causing an out-of-bounds stack write in the qemu process. If NBD server requires TLS, the attacker cannot trigger the buffer overflow without first successfully negotiating TLS.",
"evidence": "osv:CVE-2017-15118",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2017-15118",
"aliases": [
"CVE-2017-15118"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
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],
"modified": "2026-10-24T10:30:43.678168490Z",
"provider": "osv",
"references": [
"https://access.redhat.com/errata/RHSA-2018:1104",
"https://usn.ubuntu.com/3575-1/",
"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-15118",
"https://lists.gnu.org/archive/html/qemu-devel/2017-11/msg05045.html",
"https://www.exploit-db.com/exploits/43194/"
],
"provider_metadata": {
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{
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"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
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"cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*"
],
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"extracted_events": [
{
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{
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{
"last_affected": "14.04"
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{
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"source": "CPE_STRING"
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{
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],
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{
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}
},
"related_cves": [
{
"value": "CVE-2017-15118",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 435676,
"published_at": "2018-07-27T21:29:00.337+00:00"
}