MediumFix available
libslirp, qemu and 1 more products — security advisory
An out-of-bounds read vulnerability was found in the SLiRP networking implementation of the QEMU emulator. This flaw occurs in the icmp6_send_echoreply() routine while replying to an ICMP echo request, also known as ping. This flaw allows a malicious guest to leak the contents of the host memory, resulting in possible information disclosure. This flaw affects versions of libslirp before 4.3.1.
- Products
- libslirp, qemu, slirp4netns
- Affected versions
- Not specified
- Fixed versions
- 1.0.1-1, 1:4.1-2, 4.3.1-1
- CVEs
- CVE-2020-10756
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:54 UTC · Revision 1
Source evidence
An out-of-bounds read vulnerability was found in the SLiRP networking implementation of the QEMU emulator. This flaw occurs in the icmp6_send_echoreply() routine while replying to an ICMP echo request, also known as ping. This flaw allows a malicious guest to leak the contents of the host memory, resulting in possible information disclosure. This flaw affects versions of libslirp before 4.3.1.
osv:DEBIAN-CVE-2020-10756
libslirp
Fixed versions: 4.3.1-1
libslirp
Fixed versions: 4.3.1-1
libslirp
Fixed versions: 4.3.1-1
qemu
Fixed versions: 1:4.1-2
qemu
Fixed versions: 1:4.1-2
qemu
Fixed versions: 1:4.1-2
slirp4netns
Fixed versions: 1.0.1-1
slirp4netns
Fixed versions: 1.0.1-1
slirp4netns
Fixed versions: 1.0.1-1
Complete source record
{
"id": "574d0da41fba70c82f9eaf30d2d0129e5bc5d335cb592f5ab19cf58840ab780d",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2020-10756",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2020-10756",
"summary": "An out-of-bounds read vulnerability was found in the SLiRP networking implementation of the QEMU emulator. This flaw occurs in the icmp6_send_echoreply() routine while replying to an ICMP echo request, also known as ping. This flaw allows a malicious guest to leak the contents of the host memory, resulting in possible information disclosure. This flaw affects versions of libslirp before 4.3.1.",
"evidence": "osv:DEBIAN-CVE-2020-10756",
"products": [
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},
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"evidence": "/affected/0/ranges"
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{
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{
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"affected_versions": []
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{
"name": {
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"affected_versions": []
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],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2020-10756",
"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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{
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],
"package": {
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"purl": "pkg:deb/debian/libslirp?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-10756.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
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"package": {
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"package": {
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{
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"package": {
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},
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},
{
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],
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},
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},
"ecosystem_specific": {
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},
{
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],
"package": {
"name": "qemu",
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},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
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],
"package": {
"name": "slirp4netns",
"purl": "pkg:deb/debian/slirp4netns?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-10756.json"
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{
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],
"package": {
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"purl": "pkg:deb/debian/slirp4netns?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-10756.json"
},
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},
{
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],
"package": {
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},
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"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-10756.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-26T12:01:14.340836680Z",
"provider": "osv",
"upstream": [
"CVE-2020-10756"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2020-10756"
]
},
"related_cves": [
{
"value": "CVE-2020-10756",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 451522,
"published_at": "2020-07-09T16:15:13.47+00:00"
}