ubuntu-cve-2026-54559
Vulnerability from osv_ubuntu
Published
2026-09-14 20:16
Modified
2026-09-14 20:16
Summary
Details
PocketSphinx is a small speech recognizer. Prior to 5.1.1, the trie language-model loaders in src/lm/ngram_model_trie.c do not adequately validate boundary conditions in ARPA, DMP, and binary format headers, and the acoustic-model loaders in src/mdef.c and src/util/bio.c use sscanf with unbounded string fields. Loading an invalid, corrupted, or malicious language or acoustic model can therefore cause stack or heap buffer overflows and memory corruption. An attacker who can write to a directory selected by POCKETSPHINX_PATH can replace or add a model file that PocketSphinx later loads; users of PocketSphinx 5prealpha have no backported patch and must migrate to the fixed release. This issue is fixed in version 5.1.1.
Severity
N/A (UNKNOWN)
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gstreamer1.0-pocketsphinx",
"binary_version": "0.8.0+real5prealpha-1ubuntu2"
},
{
"binary_name": "libpocketsphinx3",
"binary_version": "0.8.0+real5prealpha-1ubuntu2"
},
{
"binary_name": "pocketsphinx",
"binary_version": "0.8.0+real5prealpha-1ubuntu2"
},
{
"binary_name": "pocketsphinx-en-us",
"binary_version": "0.8.0+real5prealpha-1ubuntu2"
},
{
"binary_name": "python-pocketsphinx",
"binary_version": "0.8.0+real5prealpha-1ubuntu2"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "pocketsphinx",
"purl": "pkg:deb/ubuntu/pocketsphinx@0.8.0+real5prealpha-1ubuntu2?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.8.0+real-0ubuntu6",
"0.8.0+real5prealpha-1ubuntu2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gstreamer1.0-pocketsphinx",
"binary_version": "0.8.0+real5prealpha-1ubuntu2"
},
{
"binary_name": "libpocketsphinx3",
"binary_version": "0.8.0+real5prealpha-1ubuntu2"
},
{
"binary_name": "pocketsphinx",
"binary_version": "0.8.0+real5prealpha-1ubuntu2"
},
{
"binary_name": "pocketsphinx-en-us",
"binary_version": "0.8.0+real5prealpha-1ubuntu2"
},
{
"binary_name": "python-pocketsphinx",
"binary_version": "0.8.0+real5prealpha-1ubuntu2"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "pocketsphinx",
"purl": "pkg:deb/ubuntu/pocketsphinx@0.8.0+real5prealpha-1ubuntu2?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.8.0+real5prealpha-1ubuntu2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gstreamer1.0-pocketsphinx",
"binary_version": "0.8.0+real5prealpha+1-6ubuntu4"
},
{
"binary_name": "libpocketsphinx3",
"binary_version": "0.8.0+real5prealpha+1-6ubuntu4"
},
{
"binary_name": "pocketsphinx",
"binary_version": "0.8.0+real5prealpha+1-6ubuntu4"
},
{
"binary_name": "pocketsphinx-en-us",
"binary_version": "0.8.0+real5prealpha+1-6ubuntu4"
},
{
"binary_name": "python3-pocketsphinx",
"binary_version": "0.8.0+real5prealpha+1-6ubuntu4"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "pocketsphinx",
"purl": "pkg:deb/ubuntu/pocketsphinx@0.8.0+real5prealpha+1-6ubuntu4?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.8.0+real5prealpha+1-6ubuntu1",
"0.8.0+real5prealpha+1-6ubuntu3",
"0.8.0+real5prealpha+1-6ubuntu4"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gstreamer1.0-pocketsphinx",
"binary_version": "0.8.0+real5prealpha+1-14ubuntu1"
},
{
"binary_name": "libpocketsphinx3",
"binary_version": "0.8.0+real5prealpha+1-14ubuntu1"
},
{
"binary_name": "pocketsphinx",
"binary_version": "0.8.0+real5prealpha+1-14ubuntu1"
},
{
"binary_name": "pocketsphinx-en-us",
"binary_version": "0.8.0+real5prealpha+1-14ubuntu1"
},
{
"binary_name": "pocketsphinx-testdata",
"binary_version": "0.8.0+real5prealpha+1-14ubuntu1"
},
{
"binary_name": "swig-pocketsphinx",
"binary_version": "0.8.0+real5prealpha+1-14ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "pocketsphinx",
"purl": "pkg:deb/ubuntu/pocketsphinx@0.8.0+real5prealpha+1-14ubuntu1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.8.0+real5prealpha+1-13ubuntu1",
"0.8.0+real5prealpha+1-14ubuntu1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gstreamer1.0-pocketsphinx",
"binary_version": "0.8.0+real5prealpha+1-15ubuntu5"
},
{
"binary_name": "libpocketsphinx3",
"binary_version": "0.8.0+real5prealpha+1-15ubuntu5"
},
{
"binary_name": "pocketsphinx",
"binary_version": "0.8.0+real5prealpha+1-15ubuntu5"
},
{
"binary_name": "pocketsphinx-en-us",
"binary_version": "0.8.0+real5prealpha+1-15ubuntu5"
},
{
"binary_name": "pocketsphinx-testdata",
"binary_version": "0.8.0+real5prealpha+1-15ubuntu5"
},
{
"binary_name": "swig-pocketsphinx",
"binary_version": "0.8.0+real5prealpha+1-15ubuntu5"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "pocketsphinx",
"purl": "pkg:deb/ubuntu/pocketsphinx@0.8.0+real5prealpha+1-15ubuntu5?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.8.0+real5prealpha+1-15ubuntu1",
"0.8.0+real5prealpha+1-15ubuntu4",
"0.8.0+real5prealpha+1-15ubuntu5"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gstreamer1.0-pocketsphinx",
"binary_version": "5.0.4-3ubuntu1"
},
{
"binary_name": "libpocketsphinx5",
"binary_version": "5.0.4-3ubuntu1"
},
{
"binary_name": "pocketsphinx",
"binary_version": "5.0.4-3ubuntu1"
},
{
"binary_name": "pocketsphinx-en-us",
"binary_version": "5.0.4-3ubuntu1"
},
{
"binary_name": "pocketsphinx-testdata",
"binary_version": "5.0.4-3ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "pocketsphinx",
"purl": "pkg:deb/ubuntu/pocketsphinx@5.0.4-3ubuntu1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.8.0+real5prealpha+1-15ubuntu5",
"0.8.0+real5prealpha+1-15ubuntu6",
"5.0.4-3ubuntu1"
]
}
],
"aliases": [],
"details": "PocketSphinx is a small speech recognizer. Prior to 5.1.1, the trie language-model loaders in src/lm/ngram_model_trie.c do not adequately validate boundary conditions in ARPA, DMP, and binary format headers, and the acoustic-model loaders in src/mdef.c and src/util/bio.c use sscanf with unbounded string fields. Loading an invalid, corrupted, or malicious language or acoustic model can therefore cause stack or heap buffer overflows and memory corruption. An attacker who can write to a directory selected by POCKETSPHINX_PATH can replace or add a model file that PocketSphinx later loads; users of PocketSphinx 5prealpha have no backported patch and must migrate to the fixed release. This issue is fixed in version 5.1.1.",
"id": "UBUNTU-CVE-2026-54559",
"modified": "2026-09-14T20:16:00Z",
"published": "2026-09-14T20:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-54559"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-54559"
},
{
"type": "REPORT",
"url": "https://github.com/cmusphinx/pocketsphinx/commit/2a3c03788a9973eff548664334fb781e9f4ad4a5"
},
{
"type": "REPORT",
"url": "https://github.com/cmusphinx/pocketsphinx/releases/tag/v5.1.1"
},
{
"type": "REPORT",
"url": "https://github.com/cmusphinx/pocketsphinx/security/advisories/GHSA-56r5-2p2f-7cxp"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-54559"
]
}
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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
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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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