{"id":"UBUNTU-CVE-2026-75625","details":"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.","modified":"2026-09-02T19:36:34.009287149Z","published":"2026-08-18T18:19:00Z","upstream":["CVE-2026-75625"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-75625"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-75625"}],"affected":[{"package":{"name":"kraken","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/kraken?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.5~beta-1","0.10.5~beta-2"],"ecosystem_specific":{"binaries":[{"binary_name":"kraken","binary_version":"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"}},{"package":{"name":"kraken","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/kraken?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.5~beta-5","0.10.5~beta-6","1.1-2"],"ecosystem_specific":{"binaries":[{"binary_name":"kraken","binary_version":"1.1-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75625.json"}},{"package":{"name":"kraken","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/kraken?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.1-1","1.1.1-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"kraken","binary_version":"1.1.1-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75625.json"}},{"package":{"name":"kraken","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/kraken?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.1-2","1.1.1-3"],"ecosystem_specific":{"binaries":[{"binary_name":"kraken","binary_version":"1.1.1-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75625.json"}},{"package":{"name":"kraken","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/kraken?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.1-4"],"ecosystem_specific":{"binaries":[{"binary_name":"kraken","binary_version":"1.1.1-4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75625.json"}},{"package":{"name":"kraken","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/kraken?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.1-4","1.1.1-4build1"],"ecosystem_specific":{"binaries":[{"binary_name":"kraken","binary_version":"1.1.1-4build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75625.json"}}],"schema_version":"1.9.0","severity":[{"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"}]}