{"schema":"threatline.record/2","record":{"id":"CVE-2026-93834","aliases":[],"summary":"Qemu-kvm: 9pfs: use-after-free race in tlcreate/twalk allows vm guest escape","details":"A use-after-free vulnerability was found in QEMU's 9pfs subsystem. A race condition between the main thread and a worker thread when processing concurrent Tlcreate and Twalk requests allows a malicious guest user to craft a fid path containing stale heap data, bypassing directory traversal restrictions and escaping the shared directory boundary. This can lead to arbitrary host file read/write and code execution (VM escape) as the QEMU process user.","categories":["Operating systems"],"product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93834","source_modified_at":"2026-09-25T13:50:26.440Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","versions":[],"defaultStatus":"affected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93834","source_modified_at":"2026-09-25T13:50:26.440Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat","versions":[],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93834","source_modified_at":"2026-09-25T13:50:26.440Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat","versions":[],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93834","source_modified_at":"2026-09-25T13:50:26.440Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat","versions":[],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93834","source_modified_at":"2026-09-25T13:50:26.440Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat","versions":[],"defaultStatus":"affected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93834","source_modified_at":"2026-09-25T13:50:26.440Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat","versions":[],"defaultStatus":"affected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93834","source_modified_at":"2026-09-25T13:50:26.440Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat","versions":[],"defaultStatus":"affected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93834","source_modified_at":"2026-09-25T13:50:26.440Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Red Hat Enterprise Linux for NVIDIA 26","vendor":"Red Hat","versions":[],"defaultStatus":"unknown"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93834","source_modified_at":"2026-09-25T13:50:26.440Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Red Hat OpenShift Container Platform 4","vendor":"Red Hat","versions":[],"defaultStatus":"affected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93834","source_modified_at":"2026-09-25T13:50:26.440Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Red Hat OpenShift Container Platform 4","vendor":"Red Hat","versions":[],"defaultStatus":"affected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93834","source_modified_at":"2026-09-25T13:50:26.440Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Red Hat OpenStack Platform 13 (Queens)","vendor":"Red Hat","versions":[],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":8.8,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00377,"percentile":0.30483,"score_date":"2026-10-23"},"published_at":"2026-09-25T13:36:17.597Z","modified_at":"2026-09-25T13:50:26.440Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-93834","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-25T13:50:26.440Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-93834","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-2026-93834","tags":["vdb-entry","x_refsource_REDHAT"]},{"source":"CVE List","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2537939","tags":["issue-tracking","x_refsource_REDHAT"]},{"source":"CVE List","url":"https://gitlab.com/qemu-project/qemu/-/work_items/4491","tags":["exploit"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"total","assessed_at":"2026-09-25T13:49:32.754375Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-09-25T13:50:26.440Z","content_hash":"92011099e574914b82d74c4ef35dc18338c1ca85bb486da75f7edab34e492d7e"}}