Medium
csync2 — security advisory
csync2 uses insecure temporary directories when compiled with C99 or later, allowing for TOCTOU style attacks on the temporary directories.
- Products
- csync2
- Affected versions
- 2.0+73d3293-2, 2.0+73d3293-2build1, 2.0+73d3293-2build2, 2.0-22-gce67c55-1ubuntu1, 2.0-25-gc0faaf9-1, 2.0-42-g83b3644-2, 2.0-42-g83b3644-2build1, 2.0-42-g83b3644-2build2, 2.0-42-g83b3644-2build3, 2.0-42-g83b3644-3, 2.0-42-g83b3644-3build1, 2.0-42-g83b3644-4, 2.0-42-g83b3644-6, 2.0-8-g175a01c-4ubuntu1, 2.0-8-g175a01c-4ubuntu2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-41051
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:10 UTC · Revision 1
Source evidence
csync2 uses insecure temporary directories when compiled with C99 or later, allowing for TOCTOU style attacks on the temporary directories.
osv:UBUNTU-CVE-2026-41051
csync2
Fixed versions: Not specified
csync2
Fixed versions: Not specified
csync2
Fixed versions: Not specified
csync2
Fixed versions: Not specified
csync2
Fixed versions: Not specified
csync2
Fixed versions: Not specified
csync2
Fixed versions: Not specified
csync2
Fixed versions: Not specified
Complete source record
{
"id": "f99b5d396747eb2aa5d406872e240cb80ca2ebf7fa1e96eace628656b9e8f9b8",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-41051",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-41051",
"summary": "csync2 uses insecure temporary directories when compiled with C99 or later, allowing for TOCTOU style attacks on the temporary directories.",
"evidence": "osv:UBUNTU-CVE-2026-41051",
"products": [
{
"name": {
"value": "csync2",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0+73d3293-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.0+73d3293-2build1",
"evidence": "/affected/0/versions"
},
{
"value": "2.0+73d3293-2build2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "csync2",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0-8-g175a01c-4ubuntu1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
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"evidence": "/affected/2/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "2.0-8-g175a01c-4ubuntu2",
"evidence": "/affected/2/versions"
},
{
"value": "2.0-22-gce67c55-1ubuntu1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
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"evidence": "/affected/3/package/name"
},
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"affected_versions": [
{
"value": "2.0-25-gc0faaf9-1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
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"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0-42-g83b3644-2",
"evidence": "/affected/4/versions"
},
{
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"evidence": "/affected/4/versions"
},
{
"value": "2.0-42-g83b3644-2build2",
"evidence": "/affected/4/versions"
},
{
"value": "2.0-42-g83b3644-2build3",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "csync2",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0-42-g83b3644-2build3",
"evidence": "/affected/5/versions"
},
{
"value": "2.0-42-g83b3644-3",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "csync2",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0-42-g83b3644-4",
"evidence": "/affected/6/versions"
},
{
"value": "2.0-42-g83b3644-6",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "csync2",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0-42-g83b3644-3",
"evidence": "/affected/7/versions"
},
{
"value": "2.0-42-g83b3644-3build1",
"evidence": "/affected/7/versions"
},
{
"value": "2.0-42-g83b3644-4",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-41051",
"aliases": [
"UBUNTU-CVE-2026-41051"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "csync2",
"purl": "pkg:deb/ubuntu/csync2?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"2.0+73d3293-2",
"2.0+73d3293-2build1",
"2.0+73d3293-2build2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41051.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "csync2",
"binary_version": "2.0+73d3293-2build2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "csync2",
"purl": "pkg:deb/ubuntu/csync2?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"2.0-8-g175a01c-4ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41051.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "csync2",
"binary_version": "2.0-8-g175a01c-4ubuntu1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "csync2",
"purl": "pkg:deb/ubuntu/csync2?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"2.0-8-g175a01c-4ubuntu2",
"2.0-22-gce67c55-1ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41051.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "csync2",
"binary_version": "2.0-22-gce67c55-1ubuntu1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "csync2",
"purl": "pkg:deb/ubuntu/csync2?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"2.0-25-gc0faaf9-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41051.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "csync2",
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}
]
}
},
{
"ranges": [
{
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],
"package": {
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"purl": "pkg:deb/ubuntu/csync2?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"2.0-42-g83b3644-2",
"2.0-42-g83b3644-2build1",
"2.0-42-g83b3644-2build2",
"2.0-42-g83b3644-2build3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41051.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "csync2",
"binary_version": "2.0-42-g83b3644-2build3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "csync2",
"purl": "pkg:deb/ubuntu/csync2?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"2.0-42-g83b3644-2build3",
"2.0-42-g83b3644-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41051.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "csync2",
"binary_version": "2.0-42-g83b3644-3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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}
]
}
],
"package": {
"name": "csync2",
"purl": "pkg:deb/ubuntu/csync2?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"2.0-42-g83b3644-4",
"2.0-42-g83b3644-6"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41051.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "csync2",
"binary_version": "2.0-42-g83b3644-6"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "csync2",
"purl": "pkg:deb/ubuntu/csync2?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"2.0-42-g83b3644-3",
"2.0-42-g83b3644-3build1",
"2.0-42-g83b3644-4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41051.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "csync2",
"binary_version": "2.0-42-g83b3644-4"
}
]
}
}
],
"modified": "2026-10-17T12:58:14.129376850Z",
"provider": "osv",
"upstream": [
"CVE-2026-41051"
],
"references": [
"https://ubuntu.com/security/CVE-2026-41051",
"https://www.cve.org/CVERecord?id=CVE-2026-41051",
"https://bugzilla.suse.com/show_bug.cgi?id=1262472",
"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-41051"
]
},
"related_cves": [
{
"value": "CVE-2026-41051",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 358397,
"published_at": "2026-05-13T13:01:00+00:00"
}