{"metadata": {"vulnerability": "CVE-2026-98987", "count": 28, "kinds": {"milestone": 8, "sighting": 1, "kev": 0, "other": 19}, "linked_omitted": 0}, "data": [{"timestamp": "2026-09-25T10:25:14.384Z", "date_only": false, "value": "2026-09-25T10:25:14.384Z", "kind": "milestone", "label": "Reserved", "source": "cvelistv5", "record": "CVE-2026-98987", "field": "cveMetadata.dateReserved"}, {"timestamp": "2026-10-23T12:20:06.180Z", "date_only": false, "value": "2026-10-23T12:20:06.180Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-98987", "field": "cveMetadata.datePublished", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-10-23T12:20:06.180Z", "date_only": false, "value": "2026-10-23T12:20:06.180Z", "kind": "other", "label": "Updated", "source": "cvelistv5", "record": "CVE-2026-98987", "field": "cveMetadata.dateUpdated"}, {"timestamp": "2026-10-23T12:20:06.180Z", "date_only": false, "value": "2026-10-23T12:20:06.180Z", "kind": "other", "label": "Updated", "source": "cvelistv5 / Linux", "record": "CVE-2026-98987", "field": "containers.cna.providerMetadata.dateUpdated"}, {"timestamp": "2026-10-23T13:17:00Z", "date_only": false, "value": "2026-10-23T13:17:00Z", "kind": "milestone", "label": "Published", "source": "osv_ubuntu \u00b7 UBUNTU-CVE-2026-98987", "record": "UBUNTU-CVE-2026-98987", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-23T13:17:20Z", "date_only": false, "value": "2026-10-23T13:17:20Z", "kind": "other", "label": "Nvd published at", "source": "github \u00b7 GHSA-8FP8-XWH3-VF8F", "record": "GHSA-8FP8-XWH3-VF8F", "field": "database_specific.nvd_published_at", "linked_record": true}, {"timestamp": "2026-10-23T13:17:20.643Z", "date_only": false, "value": "2026-10-23T13:17:20.643", "kind": "milestone", "label": "Published", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-98987", "record": "FKIE_CVE-2026-98987", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-23T13:17:20.643Z", "date_only": false, "value": "2026-10-23T13:17:20.643", "kind": "other", "label": "Updated", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-98987", "record": "FKIE_CVE-2026-98987", "field": "lastModified", "linked_record": true}, {"timestamp": "2026-10-23T13:31:24.840Z", "date_only": false, "value": "2026-10-23T13:31:24.840136Z", "kind": "sighting", "label": "Seen", "source": "https://infosec.exchange/users/cve/statuses/117490469058907085", "record": "CVE-2026-98987", "field": "creation_timestamp", "uuid": "0611a8e3-38ca-424d-abae-f961ab585698", "content": "CVE-2026-98987 namespace: look at the topmost mount for a mount namespace file In the Linux kernel, the following vulnerability has been resolved:\nnamespace: look at the topmost mount for a mount namespace file\nattach_recursive_mnt() preallocates a mountpoint for the root of thetopmost mount of the source so that a mount that already sits at thedestination can be put on top of the source or on top of one of itspropagated copies.\nThe copies are made without CL_COPY_MNT_NS_FILE so their chain ofovermounts is shorter than the source's. It ends below the first bindmount of a mount namespace file. So while the loop walks up the chain ofthe source it remembers the mountpoint of that mount in \"shorter\" andthe existing mount is put there for the copies.\nBut the loop ends at the topmost mount without ever looking at it. Ifthe topmost mount is the only mount namespace file in the chain\"shorter\" stays NULL and mnt_change_mountpoint() attaches the existingmount of the copy below the root of the mount namespace file. That's adentry of nsfs. No path walk in the copy's mount namespace ever getsthere. The mount is gone until its parent goes and the copy that tookits place can't be unmounted synchronously because it has a child:\n  S      bind mount of a file  N      bind mount of a mount namespace file on top of S  A      shared mount, B a slave of A, Q mounted on B/file\n  move_mount(S, A/file)  cat B/file          -> the content of S instead of Q  umount B/file       -> EBUSY\nLook at every mount of the chain including the topmost one.\nhttps://www.cve.org/CVERecord?id=CVE-2026-98987https://git.kernel.org/stable/c/b9c40553f6ceba50042281eef6f701e5fb719726https://git.kernel.org/stable/c/87ecd4c6da146363384a603bd9e90c90e7275536https://git.kernel.org/stable/c/8714b44adac7b10506e1db3ef1710689751f0f10#kernel #Linux#CVE_2026_98987#bot", "url": "https://infosec.exchange/users/cve/statuses/117490469058907085"}, {"timestamp": "2026-10-23T15:31:33Z", "date_only": false, "value": "2026-10-23T15:31:33Z", "kind": "milestone", "label": "Published", "source": "github \u00b7 GHSA-8FP8-XWH3-VF8F", 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