UBUNTU-CVE-2026-106026 (CVE-2026-106026)
Vulnerability from osv_ubuntu – Published: 2026-10-06 14:17 – Updated: 2026-10-17 10:01 – Source website
VLAI
Details
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.
Severity
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "tftp-hpa",
"binary_version": "5.2-7ubuntu3.1"
},
{
"binary_name": "tftpd-hpa",
"binary_version": "5.2-7ubuntu3.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:14.04:LTS",
"name": "tftp-hpa",
"purl": "pkg:deb/ubuntu/tftp-hpa@5.2-7ubuntu3.1?arch=source\u0026distro=trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.2-7ubuntu3",
"5.2-7ubuntu3.1"
]
},
{
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "tftp-hpa",
"purl": "pkg:deb/ubuntu/tftp-hpa@5.2+20150808-1ubuntu1.16.04.1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.2+20140608-3ubuntu1",
"5.2+20150808-1ubuntu1",
"5.2+20150808-1ubuntu1.16.04.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "tftp-hpa",
"binary_version": "5.2+20150808-1ubuntu3"
},
{
"binary_name": "tftpd-hpa",
"binary_version": "5.2+20150808-1ubuntu3"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "tftp-hpa",
"purl": "pkg:deb/ubuntu/tftp-hpa@5.2+20150808-1ubuntu3?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.2+20150808-1ubuntu3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "tftp-hpa",
"binary_version": "5.2+20150808-1ubuntu4"
},
{
"binary_name": "tftpd-hpa",
"binary_version": "5.2+20150808-1ubuntu4"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "tftp-hpa",
"purl": "pkg:deb/ubuntu/tftp-hpa@5.2+20150808-1ubuntu4?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.2+20150808-1ubuntu3",
"5.2+20150808-1ubuntu4"
]
},
{
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "tftp-hpa",
"purl": "pkg:deb/ubuntu/tftp-hpa@5.2+20150808-1.2build2?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.2+20150808-1.2build1",
"5.2+20150808-1.2build2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "tftp-hpa",
"binary_version": "5.2+20150808-1.4build1"
},
{
"binary_name": "tftpd-hpa",
"binary_version": "5.2+20150808-1.4build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "tftp-hpa",
"purl": "pkg:deb/ubuntu/tftp-hpa@5.2+20150808-1.4build1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.2+20150808-1.4",
"5.2+20150808-1.4build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "tftp-hpa",
"binary_version": "5.4-2"
},
{
"binary_name": "tftpd-hpa",
"binary_version": "5.4-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.10",
"name": "tftp-hpa",
"purl": "pkg:deb/ubuntu/tftp-hpa@5.4-2?arch=source\u0026distro=stonking"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.3+20251209-2",
"5.4-1",
"5.4-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "tftp-hpa",
"binary_version": "5.3+20251209-2"
},
{
"binary_name": "tftpd-hpa",
"binary_version": "5.3+20251209-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "tftp-hpa",
"purl": "pkg:deb/ubuntu/tftp-hpa@5.3+20251209-2?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.2+20240610-3",
"5.3+20251110-1",
"5.3+20251116-1",
"5.3+20251209-1",
"5.3+20251209-2"
]
}
],
"aliases": [],
"details": "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.",
"id": "UBUNTU-CVE-2026-106026",
"modified": "2026-10-17T10:01:20Z",
"published": "2026-10-06T14:17:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-106026"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-106026"
},
{
"type": "REPORT",
"url": "https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git/commit/?id=6735086fb6475c3e1f1daf9829836b3d06f14291"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"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": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-106026"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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