{"id":"CVE-2026-115372","kind":"vulnerability","aliases":["CVE-2026-115372"],"related":[],"title":"Incus: restricted project users can inject mkfs arguments as root","description":"Incus from 7.3.0 before 7.5.0 contains a project restriction bypass that allows restricted project users to set block.create_options through volume update, copy, and move operations. Attackers can set the option on a custom volume and trigger a copy or move onto a formatting pool to inject arguments into mkfs executed as root.","summary":"Users in a restricted Incus project can set block.create_options on a storage volume through update, copy, or move operations, bypassing the project restriction. Triggering a copy or move onto a formatting pool injects arguments into mkfs, which runs as root, so an attacker can gain root on the host.","severity":"critical","cvss":9.0,"epss":0.00362,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["incus","infrastructure","linux","self-hosted"],"not_affected_if":["default-config"],"how_to_check":"incus --version","fix":"Upgrade Incus to 7.5.0 or later.","status":"open","published_at":"2026-10-22T19:17:43+00:00","first_seen_at":"2026-10-23T21:57:31+00:00","triaged_at":"2026-10-23T22:32:11+00:00","updated_at":"2026-10-24T07:15:51+00:00","category":"infrastructure","confidence":0.7,"triage":{"at":"2026-10-23T22:32:11Z","model":"claude-haiku-5-5","output":{"fix":"Upgrade Incus to 7.5.0 or later.","reach":"local","title":"Incus: restricted project users can inject mkfs arguments as root","impact":"high","summary":"Users in a restricted Incus project can set block.create_options on a storage volume through update, copy, or move operations, bypassing the project restriction. Triggering a copy or move onto a formatting pool injects arguments into mkfs, which runs as root, so an attacker can gain root on the host.","category":"infrastructure","who_cares":["incus","self-hosted","linux"],"confidence":0.7,"needs_auth":"yes","worst_case":"Attacker gains root on the Incus host through mkfs argument injection.","analyst_note":"Confirm which restricted-project settings and storage drivers are needed to reach mkfs, and get the exact check command from the NVD or upstream Incus advisory.","how_to_check":"incus --version\nunknown","needs_analyst":true,"not_affected_if":["default-config"],"user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"critical"},"cost_usd":0.000481,"input_tokens":2934,"output_tokens":375,"severity_before":"critical"},"analyst_status":null,"analyst_note":null,"search":"'-115372':13A,16A '-2026':12A,15A '7.3.0':75C '7.5.0':77C 'allow':84C 'argument':8A,57B,120C 'attack':66B,99C 'block.create':31B,90C 'bypass':43B,82C 'contain':78C 'copi':39B,49B,95C,111C 'custom':106C 'cve':11A,14A 'execut':123C 'format':54B,116C 'gain':68B 'host':22B,72B 'incus':1A,17B,27B,73C 'infrastructur':18B 'inject':6A,56B,119C 'linux':19B 'mkfs':7A,59B,122C 'move':41B,51B,97C,113C 'onto':52B,114C 'oper':42B,98C 'option':32B,91C,103C 'pool':55B,117C 'project':3A,28B,45B,80C,86C 'restrict':2A,26B,46B,81C,85C 'root':10A,63B,69B,125C 'run':61B 'self':21B 'self-host':20B 'set':30B,89C,101C 'storag':35B 'trigger':47B,109C 'updat':38B,94C 'user':4A,23B,87C 'volum':36B,93C,107C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-22T19:17:43+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-115372","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115372","severity":null,"published_at":"2026-10-22T19:17:43+00:00","modified_at":"2026-10-23T17:06:36+00:00","first_seen_at":"2026-10-23T21:57:31+00:00","fetched_at":"2026-10-23T22:29:02+00:00","note":null},{"source":"epss","external_id":"CVE-2026-115372","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-115372","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-24T07:15:51+00:00","fetched_at":"2026-10-25T12:38:51+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}