Medium
thunar — security advisory
Xfce Thunar 1.6.15, when Xfce 4.12 is used, mishandles the IBus-Unikey input method for file searches within File Manager, leading to an out-of-bounds read and SEGV. This could potentially be exploited by an arbitrary local user who creates files in /tmp before the victim uses this input method.
- Products
- thunar
- Affected versions
- 1.6.10-1, 1.6.10-2, 1.6.10-2ubuntu1, 1.6.11-0ubuntu0.16.04.1, 1.6.11-0ubuntu0.16.04.2, 1.6.12-1, 1.6.13-1, 1.6.13-2, 1.6.14-1, 1.6.14-1ubuntu1, 1.6.15-0ubuntu1, 1.6.15-0ubuntu1.18.04.1, 1.8.11-1, 1.8.12-1, 1.8.14-0ubuntu1, 1.8.9-1, 4.16.10-1, 4.16.8-1, 4.18.7-1, 4.18.8-1, 4.18.8-1build2, 4.18.8-1build3, 4.20.2-1, 4.20.4-1, 4.20.5-1, 4.20.7-1, 4.20.8-1, 4.20.9-1
- Fixed versions
- Not specified
- CVEs
- CVE-2018-18398
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:26 UTC · Revision 1
Source evidence
Xfce Thunar 1.6.15, when Xfce 4.12 is used, mishandles the IBus-Unikey input method for file searches within File Manager, leading to an out-of-bounds read and SEGV. This could potentially be exploited by an arbitrary local user who creates files in /tmp before the victim uses this input method.
osv:UBUNTU-CVE-2018-18398
thunar
Fixed versions: Not specified
thunar
Fixed versions: Not specified
thunar
Fixed versions: Not specified
thunar
Fixed versions: Not specified
thunar
Fixed versions: Not specified
thunar
Fixed versions: Not specified
thunar
Fixed versions: Not specified
thunar
Fixed versions: Not specified
Complete source record
{
"id": "5b0cd21ce3a3c4bace47e6b1c17a69af3ce7502cdb022699b30bce5a1e2f2944",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2018-18398",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2018-18398",
"summary": "Xfce Thunar 1.6.15, when Xfce 4.12 is used, mishandles the IBus-Unikey input method for file searches within File Manager, leading to an out-of-bounds read and SEGV. This could potentially be exploited by an arbitrary local user who creates files in /tmp before the victim uses this input method.",
"evidence": "osv:UBUNTU-CVE-2018-18398",
"products": [
{
"name": {
"value": "thunar",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.6.10-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.6.10-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.6.10-2ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "1.6.11-0ubuntu0.16.04.1",
"evidence": "/affected/0/versions"
},
{
"value": "1.6.11-0ubuntu0.16.04.2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
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"evidence": "/affected/1/versions"
},
{
"value": "1.6.13-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.6.13-2",
"evidence": "/affected/1/versions"
},
{
"value": "1.6.14-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.6.14-1ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "1.6.15-0ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "1.6.15-0ubuntu1.18.04.1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
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"evidence": "/affected/2/package/name"
},
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"affected_versions": [
{
"value": "1.8.9-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.8.11-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.8.12-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.8.14-0ubuntu1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "thunar",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.16.8-1",
"evidence": "/affected/3/versions"
},
{
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"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "thunar",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "4.18.7-1",
"evidence": "/affected/4/versions"
},
{
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"evidence": "/affected/4/versions"
},
{
"value": "4.18.8-1build2",
"evidence": "/affected/4/versions"
},
{
"value": "4.18.8-1build3",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "thunar",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.20.2-1",
"evidence": "/affected/5/versions"
},
{
"value": "4.20.4-1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "thunar",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.20.7-1",
"evidence": "/affected/6/versions"
},
{
"value": "4.20.8-1",
"evidence": "/affected/6/versions"
},
{
"value": "4.20.9-1",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "thunar",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.20.4-1",
"evidence": "/affected/7/versions"
},
{
"value": "4.20.5-1",
"evidence": "/affected/7/versions"
},
{
"value": "4.20.7-1",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2018-18398",
"aliases": [
"UBUNTU-CVE-2018-18398"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "thunar",
"purl": "pkg:deb/ubuntu/thunar?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"1.6.10-1",
"1.6.10-2",
"1.6.10-2ubuntu1",
"1.6.11-0ubuntu0.16.04.1",
"1.6.11-0ubuntu0.16.04.2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-18398.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libthunarx-2-0",
"binary_version": "1.6.11-0ubuntu0.16.04.2"
},
{
"binary_name": "thunar",
"binary_version": "1.6.11-0ubuntu0.16.04.2"
},
{
"binary_name": "thunar-data",
"binary_version": "1.6.11-0ubuntu0.16.04.2"
}
]
}
},
{
"ranges": [
{
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"events": [
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],
"package": {
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"purl": "pkg:deb/ubuntu/thunar?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
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"1.6.13-1",
"1.6.13-2",
"1.6.14-1",
"1.6.14-1ubuntu1",
"1.6.15-0ubuntu1",
"1.6.15-0ubuntu1.18.04.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-18398.json"
},
"ecosystem_specific": {
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{
"binary_name": "libthunarx-2-0",
"binary_version": "1.6.15-0ubuntu1.18.04.1"
},
{
"binary_name": "thunar",
"binary_version": "1.6.15-0ubuntu1.18.04.1"
},
{
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},
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"1.8.9-1",
"1.8.11-1",
"1.8.12-1",
"1.8.14-0ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-18398.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libthunarx-3-0",
"binary_version": "1.8.14-0ubuntu1"
},
{
"binary_name": "thunar",
"binary_version": "1.8.14-0ubuntu1"
},
{
"binary_name": "thunar-data",
"binary_version": "1.8.14-0ubuntu1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
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}
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],
"package": {
"name": "thunar",
"purl": "pkg:deb/ubuntu/thunar?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"4.16.8-1",
"4.16.10-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-18398.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gir1.2-thunarx-3.0",
"binary_version": "4.16.10-1"
},
{
"binary_name": "libthunarx-3-0",
"binary_version": "4.16.10-1"
},
{
"binary_name": "thunar",
"binary_version": "4.16.10-1"
},
{
"binary_name": "thunar-data",
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}
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"4.18.8-1",
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},
"ecosystem_specific": {
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"binary_name": "libthunarx-3-0",
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{
"binary_name": "thunar",
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},
"ecosystem_specific": {
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{
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{
"binary_name": "libthunarx-3-0",
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},
{
"binary_name": "thunar",
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{
"binary_name": "thunar-data",
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}
},
{
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],
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},
"versions": [
"4.20.4-1",
"4.20.5-1",
"4.20.7-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-18398.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gir1.2-thunarx-3.0",
"binary_version": "4.20.7-1"
},
{
"binary_name": "libthunarx-3-0",
"binary_version": "4.20.7-1"
},
{
"binary_name": "thunar",
"binary_version": "4.20.7-1"
},
{
"binary_name": "thunar-data",
"binary_version": "4.20.7-1"
}
]
}
}
],
"modified": "2026-10-17T12:55:16.618144332Z",
"provider": "osv",
"upstream": [
"CVE-2018-18398"
],
"references": [
"https://ubuntu.com/security/CVE-2018-18398",
"https://0xd0ff9.wordpress.com/2018/10/18/cve-2018-18398/",
"https://www.cve.org/CVERecord?id=CVE-2018-18398"
]
},
"related_cves": [
{
"value": "CVE-2018-18398",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 353659,
"published_at": "2018-10-19T22:29:00+00:00"
}