Medium
tftp-hpa — security advisory
tftp-hpa 5.4 before 6.0 contains an out-of-bounds read vulnerability in rewrite_string() in tftpd/remap.c that walks heap memory during jump label searches. Unauthenticated remote attackers can send read or write requests whose filename matches a remap jump rule to crash the forked in.tftpd request handler.
- Products
- tftp-hpa
- Affected versions
- 5.2+20140608-3ubuntu1, 5.2+20150808-1.2build1, 5.2+20150808-1.2build2, 5.2+20150808-1.4, 5.2+20150808-1.4build1, 5.2+20150808-1ubuntu1, 5.2+20150808-1ubuntu1.16.04.1, 5.2+20150808-1ubuntu3, 5.2+20150808-1ubuntu4, 5.2+20240610-3, 5.2-7ubuntu3, 5.2-7ubuntu3.1, 5.3+20251110-1, 5.3+20251116-1, 5.3+20251209-1, 5.3+20251209-2, 5.4-1, 5.4-2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-106026
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:58 UTC · Revision 1
Source evidence
tftp-hpa 5.4 before 6.0 contains an out-of-bounds read vulnerability in rewrite_string() in tftpd/remap.c that walks heap memory during jump label searches. Unauthenticated remote attackers can send read or write requests whose filename matches a remap jump rule to crash the forked in.tftpd request handler.
osv:UBUNTU-CVE-2026-106026
tftp-hpa
Fixed versions: Not specified
tftp-hpa
Fixed versions: Not specified
tftp-hpa
Fixed versions: Not specified
tftp-hpa
Fixed versions: Not specified
tftp-hpa
Fixed versions: Not specified
tftp-hpa
Fixed versions: Not specified
tftp-hpa
Fixed versions: Not specified
tftp-hpa
Fixed versions: Not specified
Complete source record
{
"id": "b16b588d10827b20f9cf7e7784e1faa587f6e79792908190e43710c7b91ecb99",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-106026",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-106026",
"summary": "tftp-hpa 5.4 before 6.0 contains an out-of-bounds read vulnerability in rewrite_string() in tftpd/remap.c that walks heap memory during jump label searches. Unauthenticated remote attackers can send read or write requests whose filename matches a remap jump rule to crash the forked in.tftpd request handler.",
"evidence": "osv:UBUNTU-CVE-2026-106026",
"products": [
{
"name": {
"value": "tftp-hpa",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.2-7ubuntu3",
"evidence": "/affected/0/versions"
},
{
"value": "5.2-7ubuntu3.1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "tftp-hpa",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.2+20140608-3ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "5.2+20150808-1ubuntu1",
"evidence": "/affected/1/versions"
},
{
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"evidence": "/affected/1/versions"
}
]
},
{
"name": {
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"evidence": "/affected/2/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "5.2+20150808-1ubuntu3",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
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"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.2+20150808-1ubuntu3",
"evidence": "/affected/3/versions"
},
{
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"evidence": "/affected/3/versions"
}
]
},
{
"name": {
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"evidence": "/affected/4/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
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"evidence": "/affected/4/versions"
},
{
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"evidence": "/affected/4/versions"
}
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},
{
"name": {
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"evidence": "/affected/5/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "5.2+20150808-1.4",
"evidence": "/affected/5/versions"
},
{
"value": "5.2+20150808-1.4build1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "tftp-hpa",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.3+20251209-2",
"evidence": "/affected/6/versions"
},
{
"value": "5.4-1",
"evidence": "/affected/6/versions"
},
{
"value": "5.4-2",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "tftp-hpa",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.2+20240610-3",
"evidence": "/affected/7/versions"
},
{
"value": "5.3+20251110-1",
"evidence": "/affected/7/versions"
},
{
"value": "5.3+20251116-1",
"evidence": "/affected/7/versions"
},
{
"value": "5.3+20251209-1",
"evidence": "/affected/7/versions"
},
{
"value": "5.3+20251209-2",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-106026",
"aliases": [
"UBUNTU-CVE-2026-106026"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
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"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
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"purl": "pkg:deb/ubuntu/tftp-hpa?arch=source&distro=trusty",
"ecosystem": "Ubuntu:14.04:LTS"
},
"versions": [
"5.2-7ubuntu3",
"5.2-7ubuntu3.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-106026.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "tftp-hpa",
"binary_version": "5.2-7ubuntu3.1"
},
{
"binary_name": "tftpd-hpa",
"binary_version": "5.2-7ubuntu3.1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
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}
]
}
],
"package": {
"name": "tftp-hpa",
"purl": "pkg:deb/ubuntu/tftp-hpa?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"5.2+20140608-3ubuntu1",
"5.2+20150808-1ubuntu1",
"5.2+20150808-1ubuntu1.16.04.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-106026.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "tftp-hpa",
"binary_version": "5.2+20150808-1ubuntu1.16.04.1"
},
{
"binary_name": "tftpd-hpa",
"binary_version": "5.2+20150808-1ubuntu1.16.04.1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "tftp-hpa",
"purl": "pkg:deb/ubuntu/tftp-hpa?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"5.2+20150808-1ubuntu3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-106026.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "tftp-hpa",
"binary_version": "5.2+20150808-1ubuntu3"
},
{
"binary_name": "tftpd-hpa",
"binary_version": "5.2+20150808-1ubuntu3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
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],
"package": {
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"purl": "pkg:deb/ubuntu/tftp-hpa?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"5.2+20150808-1ubuntu3",
"5.2+20150808-1ubuntu4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-106026.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "tftp-hpa",
"binary_version": "5.2+20150808-1ubuntu4"
},
{
"binary_name": "tftpd-hpa",
"binary_version": "5.2+20150808-1ubuntu4"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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}
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}
],
"package": {
"name": "tftp-hpa",
"purl": "pkg:deb/ubuntu/tftp-hpa?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"5.2+20150808-1.2build1",
"5.2+20150808-1.2build2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-106026.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "tftp-hpa",
"binary_version": "5.2+20150808-1.2build2"
},
{
"binary_name": "tftpd-hpa",
"binary_version": "5.2+20150808-1.2build2"
}
]
}
},
{
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{
"type": "ECOSYSTEM",
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{
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}
]
}
],
"package": {
"name": "tftp-hpa",
"purl": "pkg:deb/ubuntu/tftp-hpa?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
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"5.2+20150808-1.4build1"
],
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},
"ecosystem_specific": {
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}
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}
},
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],
"package": {
"name": "tftp-hpa",
"purl": "pkg:deb/ubuntu/tftp-hpa?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"5.3+20251209-2",
"5.4-1",
"5.4-2"
],
"database_specific": {
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},
"ecosystem_specific": {
"binaries": [
{
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},
{
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"binary_version": "5.4-2"
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}
},
{
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"package": {
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"purl": "pkg:deb/ubuntu/tftp-hpa?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"5.2+20240610-3",
"5.3+20251110-1",
"5.3+20251116-1",
"5.3+20251209-1",
"5.3+20251209-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-106026.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "tftp-hpa",
"binary_version": "5.3+20251209-2"
},
{
"binary_name": "tftpd-hpa",
"binary_version": "5.3+20251209-2"
}
]
}
}
],
"modified": "2026-10-17T12:58:00.081910404Z",
"provider": "osv",
"upstream": [
"CVE-2026-106026"
],
"references": [
"https://ubuntu.com/security/CVE-2026-106026",
"https://www.cve.org/CVERecord?id=CVE-2026-106026",
"https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git/commit/?id=6735086fb6475c3e1f1daf9829836b3d06f14291"
]
},
"related_cves": [
{
"value": "CVE-2026-106026",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 357836,
"published_at": "2026-10-06T14:17:00+00:00"
}