Medium
Security advisory
An out-of-bounds heap buffer access flaw was found in the way the iSCSI Block driver in QEMU versions 2.12.0 before 4.2.1 handled a response coming from an iSCSI server while checking the status of a Logical Address Block (LBA) in an iscsi_co_block_status() routine. A remote user could use this flaw to crash the QEMU process, resulting in a denial of service or potential execution of arbitrary code with privileges of the QEMU process on the host.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-1711
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:32 UTC · Revision 1
Source evidence
An out-of-bounds heap buffer access flaw was found in the way the iSCSI Block driver in QEMU versions 2.12.0 before 4.2.1 handled a response coming from an iSCSI server while checking the status of a Logical Address Block (LBA) in an iscsi_co_block_status() routine. A remote user could use this flaw to crash the QEMU process, resulting in a denial of service or potential execution of arbitrary code with privileges of the QEMU process on the host.
osv:CVE-2020-1711
Complete source record
{
"id": "13caa8c1c7b8cdbb7c986ab3ec0475d4a1341bb4210f2ea4aa8ccd48cfff3346",
"url": "https://osv.dev/vulnerability/CVE-2020-1711",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-1711",
"summary": "An out-of-bounds heap buffer access flaw was found in the way the iSCSI Block driver in QEMU versions 2.12.0 before 4.2.1 handled a response coming from an iSCSI server while checking the status of a Logical Address Block (LBA) in an iscsi_co_block_status() routine. A remote user could use this flaw to crash the QEMU process, resulting in a denial of service or potential execution of arbitrary code with privileges of the QEMU process on the host.",
"evidence": "osv:CVE-2020-1711",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2020-1711",
"aliases": [
"CVE-2020-1711"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/qemu/qemu",
"type": "GIT",
"events": [
{
"introduced": "4743c23509a51bd4ee85cc272287a41917d1be35"
},
{
"fixed": "6cdf8c4efa073eac7d5f9894329e2d07743c2955"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.12.0"
},
{
"fixed": "4.2.1"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v4.2.0",
"v4.2.0-rc5",
"v4.2.0-rc4",
"v4.2.0-rc3",
"v4.2.0-rc2",
"v4.2.0-rc1",
"v4.2.0-rc0",
"v4.1.0",
"v4.0.0",
"v4.1.0-rc5",
"v4.1.0-rc4",
"v4.1.0-rc3",
"v4.1.0-rc2",
"v4.1.0-rc1",
"v4.1.0-rc0",
"v4.0.0-rc4",
"v4.0.0-rc3",
"v4.0.0-rc2",
"v4.0.0-rc1",
"v3.1.0",
"v4.0.0-rc0",
"v3.0.0",
"v3.1.0-rc5",
"v3.1.0-rc4",
"v3.1.0-rc3",
"v3.1.0-rc2",
"v3.1.0-rc1",
"v3.1.0-rc0",
"v3.0.0-rc4",
"v3.0.0-rc3",
"v3.0.0-rc2",
"v3.0.0-rc1",
"v3.0.0-rc0",
"v2.12.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-1711.json"
}
},
{
"ranges": [
{
"repo": "https://gitlab.com/qemu-project/qemu",
"type": "GIT",
"events": [
{
"introduced": "4743c23509a51bd4ee85cc272287a41917d1be35"
},
{
"fixed": "6cdf8c4efa073eac7d5f9894329e2d07743c2955"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.12.0"
},
{
"fixed": "4.2.1"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v4.2.0",
"v4.2.0-rc5",
"v4.2.0-rc4",
"v4.2.0-rc3",
"v4.2.0-rc2",
"v4.2.0-rc1",
"v4.2.0-rc0",
"v4.1.0",
"v4.0.0",
"v4.1.0-rc5",
"v4.1.0-rc4",
"v4.1.0-rc3",
"v4.1.0-rc2",
"v4.1.0-rc1",
"v4.1.0-rc0",
"v4.0.0-rc4",
"v4.0.0-rc3",
"v4.0.0-rc2",
"v4.0.0-rc1",
"v3.1.0",
"v4.0.0-rc0",
"v3.0.0",
"v3.1.0-rc5",
"v3.1.0-rc4",
"v3.1.0-rc3",
"v3.1.0-rc2",
"v3.1.0-rc1",
"v3.1.0-rc0",
"v3.0.0-rc4",
"v3.0.0-rc3",
"v3.0.0-rc2",
"v3.0.0-rc1",
"v3.0.0-rc0",
"v2.12.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-1711.json"
}
}
],
"modified": "2026-10-24T10:30:19.714734718Z",
"provider": "osv",
"references": [
"https://access.redhat.com/errata/RHSA-2020:0669",
"https://access.redhat.com/errata/RHSA-2020:0730",
"https://access.redhat.com/errata/RHSA-2020:0731",
"https://access.redhat.com/errata/RHSA-2020:0773",
"https://lists.debian.org/debian-lts-announce/2020/03/msg00017.html",
"https://lists.debian.org/debian-lts-announce/2020/09/msg00013.html",
"https://security.gentoo.org/glsa/202005-02",
"https://usn.ubuntu.com/4283-1/",
"https://www.openwall.com/lists/oss-security/2020/01/23/3",
"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1711",
"https://lists.gnu.org/archive/html/qemu-devel/2020-01/msg05535.html"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "8.0"
},
{
"last_affected": "8.0"
},
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*"
],
"vendor_product": "opensuse:leap",
"extracted_events": [
{
"range": [
{
"introduced": "15.1"
},
{
"last_affected": "15.1"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux",
"extracted_events": [
{
"range": [
{
"introduced": "7.0"
},
{
"last_affected": "7.0"
},
{
"introduced": "8.0"
},
{
"last_affected": "8.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:*",
"cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:openstack",
"extracted_events": [
{
"range": [
{
"introduced": "10"
},
{
"last_affected": "10"
},
{
"introduced": "13"
},
{
"last_affected": "13"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2020-1711",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 430095,
"published_at": "2020-02-11T20:15:11.35+00:00"
}