Critical
kraken — security advisory
Kraken agents fail to verify peer-to-peer downloaded blobs against their requested SHA-256 digest before committing to the content-addressable cache, relying only on CRC32 checksums for piece validation. Attackers on the agent-to-agent path or malicious peers can supply substituted content with forged CRC32 corrections that passes per-piece checks, poisoning the cache with attacker-chosen container image layers or manifests that are re-seeded and executed by other hosts.
- Products
- kraken
- Affected versions
- 0.10.5~beta-1, 0.10.5~beta-2, 0.10.5~beta-5, 0.10.5~beta-6, 1.1-2, 1.1.1-1, 1.1.1-1build1, 1.1.1-2, 1.1.1-3, 1.1.1-4, 1.1.1-4build1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-75625
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:17 UTC · Revision 1
Source evidence
Kraken agents fail to verify peer-to-peer downloaded blobs against their requested SHA-256 digest before committing to the content-addressable cache, relying only on CRC32 checksums for piece validation. Attackers on the agent-to-agent path or malicious peers can supply substituted content with forged CRC32 corrections that passes per-piece checks, poisoning the cache with attacker-chosen container image layers or manifests that are re-seeded and executed by other hosts.
osv:UBUNTU-CVE-2026-75625
kraken
Fixed versions: Not specified
kraken
Fixed versions: Not specified
kraken
Fixed versions: Not specified
kraken
Fixed versions: Not specified
kraken
Fixed versions: Not specified
kraken
Fixed versions: Not specified
kraken
Fixed versions: Not specified
Complete source record
{
"id": "ef1d876f48128eaecea493a40f295e73cbef986c9745501d37d5721e05cf259b",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-75625",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-75625",
"summary": "Kraken agents fail to verify peer-to-peer downloaded blobs against their requested SHA-256 digest before committing to the content-addressable cache, relying only on CRC32 checksums for piece validation. Attackers on the agent-to-agent path or malicious peers can supply substituted content with forged CRC32 corrections that passes per-piece checks, poisoning the cache with attacker-chosen container image layers or manifests that are re-seeded and executed by other hosts.",
"evidence": "osv:UBUNTU-CVE-2026-75625",
"products": [
{
"name": {
"value": "kraken",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.10.5~beta-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.10.5~beta-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "kraken",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.10.5~beta-5",
"evidence": "/affected/1/versions"
},
{
"value": "0.10.5~beta-6",
"evidence": "/affected/1/versions"
},
{
"value": "1.1-2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "kraken",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.1-1build1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "kraken",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.1-2",
"evidence": "/affected/3/versions"
},
{
"value": "1.1.1-3",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "kraken",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.1-4",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "kraken",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.1-4build1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "kraken",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.1-4",
"evidence": "/affected/6/versions"
},
{
"value": "1.1.1-4build1",
"evidence": "/affected/6/versions"
}
]
}
],
"severity": "critical",
"structured": {
"id": "UBUNTU-CVE-2026-75625",
"aliases": [
"UBUNTU-CVE-2026-75625"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "kraken",
"purl": "pkg:deb/ubuntu/kraken?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"0.10.5~beta-1",
"0.10.5~beta-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75625.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "kraken",
"binary_version": "0.10.5~beta-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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}
]
}
],
"package": {
"name": "kraken",
"purl": "pkg:deb/ubuntu/kraken?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"0.10.5~beta-5",
"0.10.5~beta-6",
"1.1-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75625.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "kraken",
"binary_version": "1.1-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "kraken",
"purl": "pkg:deb/ubuntu/kraken?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"1.1.1-1",
"1.1.1-1build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75625.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "kraken",
"binary_version": "1.1.1-1build1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "kraken",
"purl": "pkg:deb/ubuntu/kraken?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"1.1.1-2",
"1.1.1-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75625.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "kraken",
"binary_version": "1.1.1-3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
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],
"package": {
"name": "kraken",
"purl": "pkg:deb/ubuntu/kraken?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"1.1.1-4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75625.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "kraken",
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}
]
}
},
{
"ranges": [
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"type": "ECOSYSTEM",
"events": [
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}
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],
"package": {
"name": "kraken",
"purl": "pkg:deb/ubuntu/kraken?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"1.1.1-4build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75625.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "kraken",
"binary_version": "1.1.1-4build1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "kraken",
"purl": "pkg:deb/ubuntu/kraken?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"1.1.1-4",
"1.1.1-4build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75625.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "kraken",
"binary_version": "1.1.1-4build1"
}
]
}
}
],
"modified": "2026-10-17T13:01:05.627568231Z",
"provider": "osv",
"upstream": [
"CVE-2026-75625"
],
"references": [
"https://ubuntu.com/security/CVE-2026-75625",
"https://www.cve.org/CVERecord?id=CVE-2026-75625"
]
},
"related_cves": [
{
"value": "CVE-2026-75625",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 360954,
"published_at": "2026-08-18T18:19:00+00:00"
}