{"vulnerability": "CVE-2026-64399", "sightings": [{"uuid": "8c6eee9d-27d7-4d59-a3e3-bbdad719c801", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "86ecb4e1-bb32-44d5-9f39-8a4673af8385", "vulnerability": "CVE-2026-64399", "type": "seen", "source": "https://www.hkcert.org/security-bulletin/debian-linux-kernel-multiple-vulnerabilities_20260806", "content": "", "creation_timestamp": "2026-08-06T04:50:58.101305Z"}, {"uuid": "1a6039f0-12f8-4742-b5fe-39163305bed0", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-64399", "type": "seen", "source": "https://bsky.app/profile/hugovalters.bsky.social/post/3mriebgo2ti2z", "content": "CVE-2026-64399 - Linux ksmbd missing permission checks on FSCTL_DUPLICATE_EXTENTS_TO_FILE. Allows data overwrite on read-only shares. CVSS 0.0. No patch yet; monitor for updates. #CVE #Linux #infosec\n\nhttps://www.valtersit.com/cve/CVE-2026-64399/", "creation_timestamp": "2026-07-25T17:09:54.843603Z"}, {"uuid": "c5cc0bd1-da5b-421c-bc6a-3b8069c00641", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-64399", "type": "seen", "source": "https://mastodon.social/users/hugovalters/statuses/116981720297678493", "content": "CVE-2026-64399 - Linux ksmbd missing permission checks on FSCTL_DUPLICATE_EXTENTS_TO_FILE. Allows data overwrite on read-only shares. CVSS 0.0. No patch yet; monitor for updates. #CVE #Linux #infosec\nhttps://www.valtersit.com/cve/CVE-2026-64399/", "creation_timestamp": "2026-07-25T17:09:54.941224Z"}, {"uuid": "3bb3e36e-b61b-41be-b5f8-be489576a181", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-64399", "type": "seen", "source": "https://bsky.app/profile/stackflag.bsky.social/post/3mrmavdlqwi2z", "content": "CVE-2026-64399 - linux\nThe ksmbd file sharing service for Linux does not properly check permissions when copying data. This can allow a malicious client to overwrite data on a read-only share or from a handle with\u2026\n\nToo many irrelevant or confusing CVEs? Use stackflag.com\n\n#linux #CVE #infosec", "creation_timestamp": "2026-07-27T06:20:07.036944Z"}, {"uuid": "9a7dfef4-0936-46cd-93d7-b5b7bf592163", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "af0120d0-3dac-4a6a-974b-a9f33d2a9846", "vulnerability": "CVE-2026-64399", "type": "seen", "source": "https://vulnerability.circl.lu/bundle/0993320a-8372-47e9-a37e-158a64a4e0dc", "content": "", "creation_timestamp": "2026-09-15T12:46:43.200012Z"}]}