{"metadata": {"vulnerability": "CVE-2026-98989", "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-2026-98989", "field": "cveMetadata.dateReserved"}, {"timestamp": "2026-10-23T12:20:08.366Z", "date_only": false, "value": "2026-10-23T12:20:08.366Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-98989", "field": "cveMetadata.datePublished", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-10-23T12:20:08.366Z", "date_only": false, "value": "2026-10-23T12:20:08.366Z", "kind": "other", "label": "Updated", "source": "cvelistv5", "record": "CVE-2026-98989", "field": "cveMetadata.dateUpdated"}, {"timestamp": "2026-10-23T12:20:08.366Z", "date_only": false, "value": "2026-10-23T12:20:08.366Z", "kind": "other", "label": "Updated", "source": "cvelistv5 / Linux", "record": "CVE-2026-98989", "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-2026-98989", "record": "UBUNTU-CVE-2026-98989", "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-88XJ-3P4J-2C73", "record": "GHSA-88XJ-3P4J-2C73", "field": "database_specific.nvd_published_at", "linked_record": true}, {"timestamp": "2026-10-23T13:17:20.863Z", "date_only": false, "value": "2026-10-23T13:17:20.863", "kind": "milestone", "label": "Published", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-98989", "record": "FKIE_CVE-2026-98989", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-23T13:17:20.863Z", "date_only": false, "value": "2026-10-23T13:17:20.863", "kind": "other", "label": "Updated", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-98989", "record": "FKIE_CVE-2026-98989", "field": "lastModified", "linked_record": true}, {"timestamp": "2026-10-23T13:32:45.581Z", "date_only": false, "value": "2026-10-23T13:32:45.581510Z", "kind": "sighting", "label": "Seen", "source": "https://infosec.exchange/users/cve/statuses/117490474351993408", "record": "CVE-2026-98989", "field": "creation_timestamp", "uuid": "b839e48c-3892-48e7-ac36-cece245880de", "content": "CVE-2026-98989 namespace: check a recursive bind mount for mount namespace loops In the Linux kernel, the following vulnerability has been resolved:\nnamespace: check a recursive bind mount for mount namespace loops\ndo_loopback() refuses to bind mount the file of a mount namespace thatis as old as the caller's or older because a mount namespace that holdsa mount of its own file, or of an ancestor's, would cause a cycle. Butit only checks the dentry the bind mount starts from. With MS_RECeverything below it is copied and do_loopback() passesCL_COPY_MNT_NS_FILE so mount namespace files below the source arecopied.\nThat's fine for a source in the caller's own mount namespace. Everymount namespace file in there passed the same check when it wasbind-mounted. It isn't fine for a source in another mount namespace.may_copy_tree() accepts a bind mount of any nsfs or pidfs file no matterwhat mount namespace it lives in so that /proc/<pid>/ns/<ns> and pidfdscan be bind mounted. If we create a bind-mount stack of mount namespacesfile descriptors the kernel will copy them irrespective of theirancestoral relationship to the mount namespace in question:\n  151 146 0:7 net:[4026531833] /tmp/nrc/y rw - nsfs nsfs rw  152 151 0:7 mnt:[4026532293] /tmp/nrc/y rw - nsfs nsfs rw\nMount 152 is a mount of the mount namespace file of mount namespace4026532293 inside mount namespace 4026532293. That namespace and everymount in it are leaked... All it takes is a process in an older mountnamespace that stacks the file and repeating it leaks without limit:\n  after control: Shmem:               380 kB  child: mount(/proc/self/fd/6, MS_BIND|MS_REC): ok  after cycle: Shmem:             65916 kB\ndo_move_mount() runs check_for_nsfs_mounts() over a detached tree forexactly that reason. Do the same for the copy before it is grafted.\nhttps://www.cve.org/CVERecord?id=CVE-2026-98989https://git.kernel.org/stable/c/a0ba48256f5dff6f75a45f8ce39fe57f21df1022https://git.kernel.org/stable/c/37a82f400efa4d263542a5fa41755b21057f1e5dhttps://git.kernel.org/stable/c/c640a01a78e42302879006ed7b7d5a9a943ba815#kernel #Linux#CVE_2026_98989#bot", "url": "https://infosec.exchange/users/cve/statuses/117490474351993408"}, {"timestamp": "2026-10-23T15:31:34Z", "date_only": false, "value": "2026-10-23T15:31:34Z", "kind": "milestone", "label": "Published", "source": "github \u00b7 GHSA-88XJ-3P4J-2C73", "record": "GHSA-88XJ-3P4J-2C73", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-23T15:31:34Z", "date_only": false, "value": "2026-10-23T15:31:34Z", "kind": "other", "label": "Updated", "source": "github \u00b7 GHSA-88XJ-3P4J-2C73", "record": "GHSA-88XJ-3P4J-2C73", "field": "modified", "linked_record": true}, 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