High
lldpd — security advisory
In lldpd before 1.0.13, when decoding SONMP packets in the sonmp_decode function, it's possible to trigger an out-of-bounds heap read via short SONMP packets.
- Products
- lldpd
- Affected versions
- 0.7.16-1, 0.7.19-1, 0.9.8-1, 0.9.9-1, 0.9.9-1ubuntu0.1, 1.0.11-1, 1.0.12-1, 1.0.13-1, 1.0.17-1, 1.0.18-1, 1.0.18-1build1, 1.0.18-1build3, 1.0.18-1build4, 1.0.18-1ubuntu0.1, 1.0.19-1, 1.0.19-1ubuntu0.1, 1.0.22-1, 1.0.22-1build1, 1.0.4-1, 1.0.4-1build1, 1.0.4-1build2
- Fixed versions
- Not specified
- CVEs
- CVE-2021-43612
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 13:48 UTC · Revision 1
Source evidence
In lldpd before 1.0.13, when decoding SONMP packets in the sonmp_decode function, it's possible to trigger an out-of-bounds heap read via short SONMP packets.
osv:UBUNTU-CVE-2021-43612
lldpd
Fixed versions: Not specified
lldpd
Fixed versions: Not specified
lldpd
Fixed versions: Not specified
lldpd
Fixed versions: Not specified
lldpd
Fixed versions: Not specified
lldpd
Fixed versions: Not specified
lldpd
Fixed versions: Not specified
lldpd
Fixed versions: Not specified
Complete source record
{
"id": "4cc469a8f8f2bb988cbe3faa50e55282e229787af4dd49f20f803b84f3c9a746",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-43612",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2021-43612",
"summary": "In lldpd before 1.0.13, when decoding SONMP packets in the sonmp_decode function, it's possible to trigger an out-of-bounds heap read via short SONMP packets.",
"evidence": "osv:UBUNTU-CVE-2021-43612",
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
"value": "1.0.19-1",
"evidence": "/affected/7/versions"
},
{
"value": "1.0.19-1ubuntu0.1",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2021-43612",
"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
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{
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},
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"database_specific": {
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},
"ecosystem_specific": {
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"binary_version": "0.7.19-1"
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},
{
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],
"package": {
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"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
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"0.9.9-1",
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],
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},
"ecosystem_specific": {
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"binary_version": "0.9.9-1ubuntu0.1"
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},
{
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],
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"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
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"1.0.4-1build1",
"1.0.4-1build2"
],
"database_specific": {
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},
"ecosystem_specific": {
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{
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},
{
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"ecosystem": "Ubuntu:22.04:LTS"
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],
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},
"ecosystem_specific": {
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},
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"ecosystem": "Ubuntu:25.10"
},
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],
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},
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},
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"modified": "2026-10-21T10:15:35.205478328Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2021-43612",
"https://www.cve.org/CVERecord?id=CVE-2021-43612"
]
},
"related_cves": [
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"source_id": "core-osv",
"document_id": 392096,
"published_at": "2023-04-15T22:15:00+00:00"
}