{"metadata": {"vulnerability": "CVE-2026-98992", "count": 22, "kinds": {"milestone": 7, "sighting": 1, "kev": 0, "other": 14}}, "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-2026-98992", "field": "cveMetadata.dateReserved"}, {"timestamp": "2026-10-23T12:20:11.256Z", "date_only": false, "value": "2026-10-23T12:20:11.256Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-98992", "field": "cveMetadata.datePublished", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"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-2026-98992", "record": "UBUNTU-CVE-2026-98992", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-23T13:17:21Z", "date_only": false, "value": "2026-10-23T13:17:21Z", "kind": "other", "label": "Nvd published at", "source": "github \u00b7 GHSA-P9PG-23XC-8CJW", "record": "GHSA-P9PG-23XC-8CJW", "field": "database_specific.nvd_published_at", "linked_record": true}, {"timestamp": "2026-10-23T13:17:21.283Z", "date_only": false, "value": "2026-10-23T13:17:21.283", "kind": "milestone", "label": "Published", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-98992", "record": "FKIE_CVE-2026-98992", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-23T13:34:46.500Z", "date_only": false, "value": "2026-10-23T13:34:46.500449Z", "kind": "sighting", "label": "Seen", "source": "https://infosec.exchange/users/cve/statuses/117490482283700326", "record": "CVE-2026-98992", "field": "creation_timestamp", "uuid": "06efc1d4-86fc-4f58-afdf-49c5e00ab815", "content": "CVE-2026-98992 namespace: don't copy an unmounted mount tree In the Linux kernel, the following vulnerability has been resolved:\nnamespace: don't copy an unmounted mount tree\nmay_copy_tree() accepts a mount whose root is an nsfs or pidfs filebefore it checks whether that mount is mounted. This exception existsfor nsfs and pidfs mounts. They are part of no mount namespace soneither check_mnt() nor is_mounted() would let them through andbind-mounting a nsfsfd or a pidfd wouldn't work.\nProblem is that exception also admits a bind mount of such a file whenit was lazily unmounted and is only kept alive by a file descriptor:\n  mount --bind /proc/self/ns/net /tmp/x  exec 3< /tmp/x  umount -l /tmp/x  mount --rbind /proc/self/fd/3 /tmp/y\nWith MS_REC or AT_RECURSIVE copy_tree() doesn't stop at the unmountedmount. It copies every mount that stayed attached to it as well. So ifyou have a bunch of overmounts over the nsfsfd or the pidfd the wholeunmounted stack is copied. That's a bug.\nSo refuse to walk an unmounted tree. Copying its root alone stayspossible. So a bind mount of a namespace that is gone can still berecreated from a file descriptor on the old one. The file descriptorpins that mount and its root and __has_locked_children() only reads thedirect children which don't leave the parent's list withoutnamespace_sem. The internal mounts carry MNT_NS_INTERNAL instead of NULLand are still walked. Copying an unmounted tree recursively fails withEINVAL.\nhttps://www.cve.org/CVERecord?id=CVE-2026-98992https://git.kernel.org/stable/c/86a2d56b1960720bf1844441c0890621e9db2f25https://git.kernel.org/stable/c/7e037b1fd339d865737c8accd29abcf40130a5a0https://git.kernel.org/stable/c/b47b40c4f058418f9707454543179df240796aadhttps://git.kernel.org/stable/c/8d3527457e183cedee3003c2897314da49488311https://git.kernel.org/stable/c/8bacbf6be959973b28b691713a872c12eae69eec#kernel #Linux#CVE_2026_98992#bot", "url": "https://infosec.exchange/users/cve/statuses/117490482283700326"}, {"timestamp": "2026-10-23T15:31:34Z", "date_only": false, "value": "2026-10-23T15:31:34Z", "kind": "milestone", "label": "Published", "source": "github \u00b7 GHSA-P9PG-23XC-8CJW", "record": "GHSA-P9PG-23XC-8CJW", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-25T01:02:58Z", "date_only": false, "value": "2026-10-25T01:02:58.000Z", "kind": 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