Medium
Security advisory
The esp_reg_write function in hw/scsi/esp.c in the 53C9X Fast SCSI Controller (FSC) support in QEMU does not properly check command buffer length, which allows local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the QEMU host via unspecified vectors.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2016-4439
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 05:38 UTC · Revision 1
Source evidence
The esp_reg_write function in hw/scsi/esp.c in the 53C9X Fast SCSI Controller (FSC) support in QEMU does not properly check command buffer length, which allows local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the QEMU host via unspecified vectors.
osv:CVE-2016-4439
Complete source record
{
"id": "19b69787b4d38f1bca61c90f6c3328ab3b987110da6e5ab3978dfc97a4d5be8d",
"url": "https://osv.dev/vulnerability/CVE-2016-4439",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2016-4439",
"summary": "The esp_reg_write function in hw/scsi/esp.c in the 53C9X Fast SCSI Controller (FSC) support in QEMU does not properly check command buffer length, which allows local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the QEMU host via unspecified vectors.",
"evidence": "osv:CVE-2016-4439",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2016-4439",
"aliases": [
"CVE-2016-4439"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/qemu/qemu",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "bfc766d38e1fae5767d43845c15c79ac8fa6d6af"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "2.6.0"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
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"v2.6.0-rc5",
"v2.6.0-rc4",
"v2.6.0-rc3",
"v2.6.0-rc2",
"v2.6.0-rc1",
"v2.6.0-rc0",
"v2.5.0",
"v2.5.0-rc4",
"v2.5.0-rc3",
"v2.5.0-rc2",
"v2.5.0-rc1",
"v2.5.0-rc0",
"v2.4.0",
"v2.4.0-rc4",
"v2.4.0-rc3",
"v2.3.0",
"v2.4.0-rc2",
"v2.4.0-rc1",
"v2.4.0-rc0",
"v2.3.0-rc4",
"v2.3.0-rc3",
"v2.3.0-rc2",
"v2.3.0-rc1",
"v2.3.0-rc0",
"v2.2.0",
"v2.2.0-rc3",
"v2.2.0-rc5",
"v2.2.0-rc4",
"v2.2.0-rc2",
"v2.2.0-rc1",
"v2.2.0-rc0",
"v2.1.0",
"v2.1.0-rc5",
"v2.1.0-rc4",
"v2.1.0-rc2",
"v2.1.0-rc3",
"v2.0.0",
"v2.1.0-rc1",
"v2.1.0-rc0",
"v2.0.0-rc3",
"v2.0.0-rc2",
"v2.0.0-rc1",
"v2.0.0-rc0",
"v1.7.0",
"v1.7.0-rc2",
"v1.7.0-rc1",
"v1.7.0-rc0",
"v1.6.0",
"v1.6.0-rc3",
"v1.6.0-rc2",
"v1.6.0-rc1",
"v1.6.0-rc0",
"v1.5.0",
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"v1.5.0-rc2",
"v1.5.0-rc1",
"v1.5.0-rc0",
"v1.4.0",
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"v1.4.0-rc1",
"v1.4.0-rc0",
"v1.3.0",
"v1.3.0-rc2",
"v1.3.0-rc1",
"v1.3.0-rc0",
"v1.2.0",
"v1.2.0-rc3",
"v1.2.0-rc2",
"v1.2.0-rc1",
"v1.2.0-rc0",
"v1.1.0",
"v1.1.0-rc4",
"v1.1.0-rc3",
"v1.1.0-rc2",
"v1.1-rc2",
"v1.1-rc1",
"v1.1-rc0",
"v1.0",
"v1.0-rc4",
"v1.0-rc3",
"v1.0-rc2",
"v1.0-rc1",
"v1.0-rc0",
"v0.14.0-rc0",
"v0.13.0-rc0",
"v0.12.0-rc0",
"v0.11.0-rc0",
"v0.5.0",
"v0.4.4",
"v0.4.3",
"v0.4.2",
"v0.4.1",
"v0.4.0",
"v0.3.0",
"v0.2.0",
"v0.1.6",
"v0.1.5",
"v0.1.4",
"v0.1.3",
"v0.1.1",
"v0.1.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-4439.json"
}
},
{
"ranges": [
{
"repo": "https://gitlab.com/qemu-project/qemu",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "bfc766d38e1fae5767d43845c15c79ac8fa6d6af"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "2.6.0"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v2.6.0",
"v2.6.0-rc5",
"v2.6.0-rc4",
"v2.6.0-rc3",
"v2.6.0-rc2",
"v2.6.0-rc1",
"v2.6.0-rc0",
"v2.5.0",
"v2.5.0-rc4",
"v2.5.0-rc3",
"v2.5.0-rc2",
"v2.5.0-rc1",
"v2.5.0-rc0",
"v2.4.0",
"v2.4.0-rc4",
"v2.4.0-rc3",
"v2.3.0",
"v2.4.0-rc2",
"v2.4.0-rc1",
"v2.4.0-rc0",
"v2.3.0-rc4",
"v2.3.0-rc3",
"v2.3.0-rc2",
"v2.3.0-rc1",
"v2.3.0-rc0",
"v2.2.0",
"v2.2.0-rc3",
"v2.2.0-rc5",
"v2.2.0-rc4",
"v2.2.0-rc2",
"v2.2.0-rc1",
"v2.2.0-rc0",
"v2.1.0",
"v2.1.0-rc5",
"v2.1.0-rc4",
"v2.1.0-rc2",
"v2.1.0-rc3",
"v2.0.0",
"v2.1.0-rc1",
"v2.1.0-rc0",
"v2.0.0-rc3",
"v2.0.0-rc2",
"v2.0.0-rc1",
"v2.0.0-rc0",
"v1.7.0",
"v1.7.0-rc2",
"v1.7.0-rc1",
"v1.7.0-rc0",
"v1.6.0",
"v1.6.0-rc3",
"v1.6.0-rc2",
"v1.6.0-rc1",
"v1.6.0-rc0",
"v1.5.0",
"v1.5.0-rc3",
"v1.5.0-rc2",
"v1.5.0-rc1",
"v1.5.0-rc0",
"v1.4.0",
"v1.4.0-rc2",
"v1.4.0-rc1",
"v1.4.0-rc0",
"v1.3.0",
"v1.3.0-rc2",
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"v1.3.0-rc0",
"v1.2.0",
"v1.2.0-rc3",
"v1.2.0-rc2",
"v1.2.0-rc1",
"v1.2.0-rc0",
"v1.1.0",
"v1.1.0-rc4",
"v1.1.0-rc3",
"v1.1.0-rc2",
"v1.1-rc2",
"v1.1-rc1",
"v1.1-rc0",
"v1.0",
"v1.0-rc4",
"v1.0-rc3",
"v1.0-rc2",
"v1.0-rc1",
"v1.0-rc0",
"v0.14.0-rc0",
"v0.13.0-rc0",
"v0.12.0-rc0",
"v0.11.0-rc0",
"v0.5.0",
"v0.4.4",
"v0.4.3",
"v0.4.2",
"v0.4.1",
"v0.4.0",
"v0.3.0",
"v0.2.0",
"v0.1.6",
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"v0.1.4",
"v0.1.3",
"v0.1.1",
"v0.1.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-4439.json"
}
}
],
"modified": "2026-10-24T10:30:31.680706705Z",
"provider": "osv",
"references": [
"https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html",
"https://security.gentoo.org/glsa/201609-01",
"https://bugzilla.redhat.com/show_bug.cgi?id=1337502",
"https://lists.gnu.org/archive/html/qemu-devel/2016-05/msg03273.html"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "12.04"
},
{
"last_affected": "12.04"
},
{
"introduced": "14.04"
},
{
"last_affected": "14.04"
},
{
"introduced": "16.04"
},
{
"last_affected": "16.04"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "8.0"
},
{
"last_affected": "8.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2016-4439",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 432862,
"published_at": "2016-05-20T14:59:07.45+00:00"
}