{"schema":"threatline.record/2","record":{"id":"CVE-2026-90954","aliases":[],"summary":"Busybox: busybox: dpkg-deb extraction-root escape via per-ar-member deferred symlink flush","details":"A flaw was found in BusyBox's dpkg-deb archive extraction. The ar archive handler flushes deferred symlinks after each archive member, unlike the tar, cpio, and unzip handlers which flush once after the last member. A specially crafted .deb archive with two data.tar members can exploit this ordering: the first member declares a symlink pointing to an absolute path (e.g., '/'), which is deferred as unsafe but flushed after the first member. The second member declares a regular file whose path traverses the now-live symlink, resulting in a file being written outside the intended extraction directory. This could allow an attacker to write arbitrary files to arbitrary locations when a user extracts a crafted .deb package.","categories":["Operating systems"],"product":"Red Hat Hardened Images","vendor":"Red Hat","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-90954","source_modified_at":"2026-10-19T19:04:36.467Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Red Hat Hardened Images","vendor":"Red Hat","versions":[],"defaultStatus":"affected"}],"fixed_versions":[],"cvss":7.8,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00197,"percentile":0.08932,"score_date":"2026-10-23"},"published_at":"2026-10-14T10:00:08.215Z","modified_at":"2026-10-19T19:04:36.467Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-90954","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T19:04:36.467Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-90954","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://access.redhat.com/security/cve/CVE-2026-90954","tags":["vdb-entry","x_refsource_REDHAT"]},{"source":"CVE List","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533007","tags":["issue-tracking","x_refsource_REDHAT"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"total","assessed_at":"2026-10-19T19:04:23.866850Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T19:04:36.467Z","content_hash":"0b65b1b0df61a801f4f91344569cfe6913ea9e4b5aff4fc65c2a0a6c66a2ca6f"}}