Medium
lwip — security advisory
lwIP through 2.2.1 contains a stack out-of-bounds write vulnerability in mdns_handle_response that allows adjacent attackers to corrupt stack memory by sending mDNS responses with invalid domain names. Attackers on the local link can send multicast PTR answers with oversized RDLENGTH or SRV answers with RDLENGTH below 6 during a service search, overflowing a 256-byte stack buffer and crashing the device.
- Products
- lwip
- Affected versions
- 2.1.3+dfsg1-2, 2.1.3+dfsg1-3, 2.1.3+dfsg1-4, 2.2.0+dfsg1-1, 2.2.0+dfsg1-2, 2.2.0+dfsg1-3, 2.2.0+dfsg1-4, 2.2.0+dfsg1-5, 2.2.0+dfsg1-6, 2.2.0+dfsg1-6.1, 2.2.0+dfsg1-6.1~exp1, 2.2.0+dfsg1-7, 2.2.0+dfsg1-8, 2.2.0+dfsg1-9, 2.2.1+dfsg1-1, 2.2.1+dfsg1-1+deb13u1, 2.2.1+dfsg1-2, 2.2.1+dfsg1-3, 2.2.1+dfsg1-4, 2.2.1+dfsg1-5, 2.2.1+dfsg1-6, 2.2.1+dfsg1-7, 2.2.1+dfsg1-8
- Fixed versions
- Not specified
- CVEs
- CVE-2026-112062
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 02:05 UTC · Revision 1
Source evidence
lwIP through 2.2.1 contains a stack out-of-bounds write vulnerability in mdns_handle_response that allows adjacent attackers to corrupt stack memory by sending mDNS responses with invalid domain names. Attackers on the local link can send multicast PTR answers with oversized RDLENGTH or SRV answers with RDLENGTH below 6 during a service search, overflowing a 256-byte stack buffer and crashing the device.
osv:DEBIAN-CVE-2026-112062
lwip
Fixed versions: Not specified
lwip
Fixed versions: Not specified
lwip
Fixed versions: Not specified
Complete source record
{
"id": "f12e969c14a8423ee6c39edddf2a04b457245b487b72e25f928ee60c39dc576b",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-112062",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-112062",
"summary": "lwIP through 2.2.1 contains a stack out-of-bounds write vulnerability in mdns_handle_response that allows adjacent attackers to corrupt stack memory by sending mDNS responses with invalid domain names. Attackers on the local link can send multicast PTR answers with oversized RDLENGTH or SRV answers with RDLENGTH below 6 during a service search, overflowing a 256-byte stack buffer and crashing the device.",
"evidence": "osv:DEBIAN-CVE-2026-112062",
"products": [
{
"name": {
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"evidence": "/affected/0/package/name"
},
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"affected_versions": [
{
"value": "2.1.3+dfsg1-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.1.3+dfsg1-3",
"evidence": "/affected/0/versions"
},
{
"value": "2.1.3+dfsg1-4",
"evidence": "/affected/0/versions"
},
{
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"evidence": "/affected/0/versions"
},
{
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{
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{
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{
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"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
},
{
"value": "2.2.0+dfsg1-6.1",
"evidence": "/affected/0/versions"
},
{
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"evidence": "/affected/0/versions"
},
{
"value": "2.2.0+dfsg1-7",
"evidence": "/affected/0/versions"
},
{
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"evidence": "/affected/0/versions"
},
{
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"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
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{
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{
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{
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"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
},
{
"value": "2.2.1+dfsg1-6",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.1+dfsg1-7",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.1+dfsg1-8",
"evidence": "/affected/0/versions"
}
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},
{
"name": {
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"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
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"evidence": "/affected/1/versions"
},
{
"value": "2.2.1+dfsg1-1+deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.1+dfsg1-2",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.1+dfsg1-3",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.1+dfsg1-4",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.1+dfsg1-5",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.1+dfsg1-6",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.1+dfsg1-7",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.1+dfsg1-8",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "lwip",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.2.1+dfsg1-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.1+dfsg1-2",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.1+dfsg1-3",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.1+dfsg1-4",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.1+dfsg1-5",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.1+dfsg1-6",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.1+dfsg1-7",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.1+dfsg1-8",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-112062",
"aliases": [
"DEBIAN-CVE-2026-112062"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "lwip",
"purl": "pkg:deb/debian/lwip?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.1.3+dfsg1-2",
"2.1.3+dfsg1-3",
"2.1.3+dfsg1-4",
"2.2.0+dfsg1-1",
"2.2.0+dfsg1-2",
"2.2.0+dfsg1-3",
"2.2.0+dfsg1-4",
"2.2.0+dfsg1-5",
"2.2.0+dfsg1-6",
"2.2.0+dfsg1-6.1",
"2.2.0+dfsg1-6.1~exp1",
"2.2.0+dfsg1-7",
"2.2.0+dfsg1-8",
"2.2.0+dfsg1-9",
"2.2.1+dfsg1-1",
"2.2.1+dfsg1-2",
"2.2.1+dfsg1-3",
"2.2.1+dfsg1-4",
"2.2.1+dfsg1-5",
"2.2.1+dfsg1-6",
"2.2.1+dfsg1-7",
"2.2.1+dfsg1-8"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-112062.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
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"events": [
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"package": {
"name": "lwip",
"purl": "pkg:deb/debian/lwip?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
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"2.2.1+dfsg1-1+deb13u1",
"2.2.1+dfsg1-2",
"2.2.1+dfsg1-3",
"2.2.1+dfsg1-4",
"2.2.1+dfsg1-5",
"2.2.1+dfsg1-6",
"2.2.1+dfsg1-7",
"2.2.1+dfsg1-8"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-112062.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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}
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}
],
"package": {
"name": "lwip",
"purl": "pkg:deb/debian/lwip?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.2.1+dfsg1-1",
"2.2.1+dfsg1-2",
"2.2.1+dfsg1-3",
"2.2.1+dfsg1-4",
"2.2.1+dfsg1-5",
"2.2.1+dfsg1-6",
"2.2.1+dfsg1-7",
"2.2.1+dfsg1-8"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-112062.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
}
],
"modified": "2026-10-23T18:05:33.165082423Z",
"provider": "osv",
"upstream": [
"CVE-2026-112062"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-112062"
]
},
"related_cves": [
{
"value": "CVE-2026-112062",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 424504,
"published_at": "2026-10-18T13:16:38.75+00:00"
}