Medium
busybox — security advisory
A flaw was found in busybox. The tar applet's deferred link-creation handling for symlink and hardlink entries with unsafe-looking targets does not validate that the resolved destination remains inside the extraction directory once the deferred link is created. An attacker can craft a tar archive using a symlink target of exactly '..' combined with a deferred hardlink to create a new file outside the extraction directory, or reuse an extraction directory across two archives to replace an existing file outside it. If the archive is extracted with elevated privileges, this flaw can lead to privilege escalation or arbitrary code execution.
- Products
- busybox
- Affected versions
- 1:1.35.0-4, 1:1.35.0-4+deb12u1, 1:1.36.0-1~exp1, 1:1.36.1-1, 1:1.36.1-2, 1:1.36.1-3, 1:1.36.1-3.1, 1:1.36.1-4, 1:1.36.1-5, 1:1.36.1-6, 1:1.36.1-6~exp.1, 1:1.36.1-7, 1:1.36.1-8, 1:1.36.1-9, 1:1.37.0-1, 1:1.37.0-10, 1:1.37.0-10.1, 1:1.37.0-2, 1:1.37.0-3, 1:1.37.0-4, 1:1.37.0-5, 1:1.37.0-6, 1:1.37.0-7, 1:1.37.0-8, 1:1.37.0-9, 1:1.38.0-1, 1:1.38.0-2, 1:1.38.0-3
- Fixed versions
- Not specified
- CVEs
- CVE-2026-108119
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 11:48 UTC · Revision 1
Source evidence
A flaw was found in busybox. The tar applet's deferred link-creation handling for symlink and hardlink entries with unsafe-looking targets does not validate that the resolved destination remains inside the extraction directory once the deferred link is created. An attacker can craft a tar archive using a symlink target of exactly '..' combined with a deferred hardlink to create a new file outside the extraction directory, or reuse an extraction directory across two archives to replace an existing file outside it. If the archive is extracted with elevated privileges, this flaw can lead to privilege escalation or arbitrary code execution.
osv:DEBIAN-CVE-2026-108119
busybox
Fixed versions: Not specified
busybox
Fixed versions: Not specified
busybox
Fixed versions: Not specified
Complete source record
{
"id": "3adea5cbe0e0d793ea4c8baf2bb25cd640f4e7dbdc351291443d5fe9a23cc5b5",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-108119",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-108119",
"summary": "A flaw was found in busybox. The tar applet's deferred link-creation handling for symlink and hardlink entries with unsafe-looking targets does not validate that the resolved destination remains inside the extraction directory once the deferred link is created. An attacker can craft a tar archive using a symlink target of exactly '..' combined with a deferred hardlink to create a new file outside the extraction directory, or reuse an extraction directory across two archives to replace an existing file outside it. If the archive is extracted with elevated privileges, this flaw can lead to privilege escalation or arbitrary code execution.",
"evidence": "osv:DEBIAN-CVE-2026-108119",
"products": [
{
"name": {
"value": "busybox",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:1.35.0-4",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.35.0-4+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.36.0-1~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.36.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.36.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.36.1-3",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.36.1-3.1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.36.1-4",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.36.1-5",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.36.1-6",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.36.1-6~exp.1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.36.1-7",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.36.1-8",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.36.1-9",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.37.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.37.0-10",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.37.0-10.1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.37.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.37.0-3",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.37.0-4",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.37.0-5",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.37.0-6",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.37.0-7",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.37.0-8",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.37.0-9",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.38.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.38.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.38.0-3",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "busybox",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:1.37.0-10",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.37.0-10.1",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.37.0-6",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.37.0-7",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.37.0-8",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.37.0-9",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.38.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.38.0-2",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.38.0-3",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "busybox",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:1.37.0-10",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.37.0-10.1",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.37.0-6",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.37.0-7",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.37.0-8",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.37.0-9",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.38.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.38.0-2",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.38.0-3",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-108119",
"aliases": [
"DEBIAN-CVE-2026-108119"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "busybox",
"purl": "pkg:deb/debian/busybox?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1:1.35.0-4",
"1:1.35.0-4+deb12u1",
"1:1.36.0-1~exp1",
"1:1.36.1-1",
"1:1.36.1-2",
"1:1.36.1-3",
"1:1.36.1-3.1",
"1:1.36.1-4",
"1:1.36.1-5",
"1:1.36.1-6",
"1:1.36.1-6~exp.1",
"1:1.36.1-7",
"1:1.36.1-8",
"1:1.36.1-9",
"1:1.37.0-1",
"1:1.37.0-10",
"1:1.37.0-10.1",
"1:1.37.0-2",
"1:1.37.0-3",
"1:1.37.0-4",
"1:1.37.0-5",
"1:1.37.0-6",
"1:1.37.0-7",
"1:1.37.0-8",
"1:1.37.0-9",
"1:1.38.0-1",
"1:1.38.0-2",
"1:1.38.0-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-108119.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "busybox",
"purl": "pkg:deb/debian/busybox?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1:1.37.0-10",
"1:1.37.0-10.1",
"1:1.37.0-6",
"1:1.37.0-7",
"1:1.37.0-8",
"1:1.37.0-9",
"1:1.38.0-1",
"1:1.38.0-2",
"1:1.38.0-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-108119.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "busybox",
"purl": "pkg:deb/debian/busybox?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1:1.37.0-10",
"1:1.37.0-10.1",
"1:1.37.0-6",
"1:1.37.0-7",
"1:1.37.0-8",
"1:1.37.0-9",
"1:1.38.0-1",
"1:1.38.0-2",
"1:1.38.0-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-108119.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-14T09:47:39.176823865Z",
"provider": "osv",
"upstream": [
"CVE-2026-108119"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-108119"
]
},
"related_cves": [
{
"value": "CVE-2026-108119",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 315357,
"published_at": "2026-10-09T17:16:46.4+00:00"
}