HighFix available
bash-completion, util-linux — security advisory
In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command (within Bash) by a different user, as demonstrated by logging in as root and entering umount followed by a tab character for autocompletion.
- Products
- bash-completion, util-linux
- Affected versions
- 1:2.11-6, 1:2.11-7, 1:2.11-8, 1:2.12.0-1, 1:2.13.0-1, 1:2.14.0-1, 1:2.14.0-2, 1:2.16.0-1, 1:2.16.0-2, 1:2.16.0-3, 1:2.16.0-4, 1:2.16.0-5, 1:2.16.0-6, 1:2.16.0-7, 1:2.16.0-8
- Fixed versions
- 2.31.1-0.5
- CVEs
- CVE-2018-7738
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 00:16 UTC · Revision 1
Source evidence
In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command (within Bash) by a different user, as demonstrated by logging in as root and entering umount followed by a tab character for autocompletion.
osv:DEBIAN-CVE-2018-7738
bash-completion
Fixed versions: Not specified
bash-completion
Fixed versions: Not specified
bash-completion
Fixed versions: Not specified
util-linux
Fixed versions: 2.31.1-0.5
util-linux
Fixed versions: 2.31.1-0.5
util-linux
Fixed versions: 2.31.1-0.5
Complete source record
{
"id": "bba1d7f75c1a1574fa4c72e954fd7ee46614bc2dc2aa6e3e3a3615ee1e473674",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2018-7738",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2018-7738",
"summary": "In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command (within Bash) by a different user, as demonstrated by logging in as root and entering umount followed by a tab character for autocompletion.",
"evidence": "osv:DEBIAN-CVE-2018-7738",
"products": [
{
"name": {
"value": "bash-completion",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:2.11-6",
"evidence": "/affected/0/versions"
},
{
"value": "1:2.11-7",
"evidence": "/affected/0/versions"
},
{
"value": "1:2.11-8",
"evidence": "/affected/0/versions"
},
{
"value": "1:2.12.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "1:2.13.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "1:2.14.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "1:2.14.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "1:2.16.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "1:2.16.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "1:2.16.0-3",
"evidence": "/affected/0/versions"
},
{
"value": "1:2.16.0-4",
"evidence": "/affected/0/versions"
},
{
"value": "1:2.16.0-5",
"evidence": "/affected/0/versions"
},
{
"value": "1:2.16.0-6",
"evidence": "/affected/0/versions"
},
{
"value": "1:2.16.0-7",
"evidence": "/affected/0/versions"
},
{
"value": "1:2.16.0-8",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "bash-completion",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:2.16.0-7",
"evidence": "/affected/1/versions"
},
{
"value": "1:2.16.0-8",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "bash-completion",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:2.16.0-7",
"evidence": "/affected/2/versions"
},
{
"value": "1:2.16.0-8",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "util-linux",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.31.1-0.5",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "util-linux",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.31.1-0.5",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "util-linux",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.31.1-0.5",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2018-7738",
"aliases": [
"DEBIAN-CVE-2018-7738"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "bash-completion",
"purl": "pkg:deb/debian/bash-completion?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1:2.11-6",
"1:2.11-7",
"1:2.11-8",
"1:2.12.0-1",
"1:2.13.0-1",
"1:2.14.0-1",
"1:2.14.0-2",
"1:2.16.0-1",
"1:2.16.0-2",
"1:2.16.0-3",
"1:2.16.0-4",
"1:2.16.0-5",
"1:2.16.0-6",
"1:2.16.0-7",
"1:2.16.0-8"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-7738.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "bash-completion",
"purl": "pkg:deb/debian/bash-completion?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1:2.16.0-7",
"1:2.16.0-8"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-7738.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "bash-completion",
"purl": "pkg:deb/debian/bash-completion?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1:2.16.0-7",
"1:2.16.0-8"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-7738.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.31.1-0.5"
}
]
}
],
"package": {
"name": "util-linux",
"purl": "pkg:deb/debian/util-linux?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-7738.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.31.1-0.5"
}
]
}
],
"package": {
"name": "util-linux",
"purl": "pkg:deb/debian/util-linux?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-7738.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.31.1-0.5"
}
]
}
],
"package": {
"name": "util-linux",
"purl": "pkg:deb/debian/util-linux?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-7738.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-23T18:03:09.276591201Z",
"provider": "osv",
"upstream": [
"CVE-2018-7738"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2018-7738"
]
},
"related_cves": [
{
"value": "CVE-2018-7738",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 420608,
"published_at": "2018-03-07T02:29:03.533+00:00"
}