{"metadata": {"vulnerability": "CVE-2026-98983", "count": 23, "kinds": {"milestone": 7, "sighting": 1, "kev": 0, "other": 15}}, "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-2026-98983", "field": "cveMetadata.dateReserved"}, {"timestamp": "2026-10-23T12:20:00.918Z", "date_only": false, "value": "2026-10-23T12:20:00.918Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-98983", "field": "cveMetadata.datePublished", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-10-23T12:20:00.918Z", "date_only": false, "value": "2026-10-23T12:20:00.918Z", "kind": "other", "label": "Updated", "source": "cvelistv5", "record": "CVE-2026-98983", "field": "cveMetadata.dateUpdated"}, {"timestamp": "2026-10-23T12:20:00.918Z", "date_only": false, "value": "2026-10-23T12:20:00.918Z", "kind": "other", "label": "Updated", "source": "cvelistv5 / Linux", "record": "CVE-2026-98983", "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-2026-98983", "record": "UBUNTU-CVE-2026-98983", "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-VC4V-Q632-X9G5", "record": "GHSA-VC4V-Q632-X9G5", "field": "database_specific.nvd_published_at", "linked_record": true}, {"timestamp": "2026-10-23T13:17:20.160Z", "date_only": false, "value": "2026-10-23T13:17:20.160", "kind": "milestone", "label": "Published", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-98983", "record": "FKIE_CVE-2026-98983", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-23T13:17:20.160Z", "date_only": false, "value": "2026-10-23T13:17:20.160", "kind": "other", "label": "Updated", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-98983", "record": "FKIE_CVE-2026-98983", "field": "lastModified", "linked_record": true}, {"timestamp": "2026-10-23T13:28:44.165Z", "date_only": false, "value": "2026-10-23T13:28:44.165328Z", "kind": "sighting", "label": "Seen", "source": "https://infosec.exchange/users/cve/statuses/117490458481757198", "record": "CVE-2026-98983", "field": "creation_timestamp", "uuid": "a08b9a31-67a3-4aa7-9d83-4bca13692d5a", "content": "CVE-2026-98983 unshare: don't drop active namespace references that were never taken In the Linux kernel, the following vulnerability has been resolved:\nunshare: don't drop active namespace references that were never taken\nActive references on the namespaces of an nsproxy are taken when thensproxy is installed into a task in switch_task_namespaces() andcopy_namespaces() and dropped again by put_nsproxy() throughdeactivate_nsproxy().\nBut ksys_unshare() calls put_nsproxy() on an nsproxy that was neverinstalled when set_cred_ucounts() fails. The new namespaces of thatnsproxy go from zero to minus one and the namespaces shared with thecaller lose a reference that belongs to the nsproxy the caller keepsusing:\n  WARNING: kernel/nscommon.c:171 at __ns_ref_active_put+0x1cd/0x230   nsproxy_ns_active_put   deactivate_nsproxy   ksys_unshare\nAfterwards the namespaces the caller lives in aren't listed by listns()anymore. set_cred_ucounts() only fails when alloc_ucounts() can'tallocate and it only allocates when the real uid of the caller differsfrom its effective uid.\nCommit cefd55bd2159 (\"nsproxy: fix free_nsproxy() and simplifycreate_new_namespaces()\") separated the two cases on purpose.nsproxy_free() frees an nsproxy that was prepared but never installedand that's what a failed setns() uses in put_nsset(). Export it and useit for a failed unshare() as well.\nhttps://www.cve.org/CVERecord?id=CVE-2026-98983https://git.kernel.org/stable/c/56fe03a0c05dba4c5f6a23c391f96de1614a098chttps://git.kernel.org/stable/c/0b6f31a3c0b16066f812e94b52a704174a6f23cd#kernel #Linux#CVE_2026_98983#bot", "url": "https://infosec.exchange/users/cve/statuses/117490458481757198"}, {"timestamp": "2026-10-23T15:31:33Z", "date_only": false, "value": "2026-10-23T15:31:33Z", "kind": "milestone", "label": "Published", "source": "github \u00b7 GHSA-VC4V-Q632-X9G5", "record": "GHSA-VC4V-Q632-X9G5", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-23T15:31:33Z", "date_only": false, "value": "2026-10-23T15:31:33Z", "kind": "other", "label": "Updated", "source": "github \u00b7 GHSA-VC4V-Q632-X9G5", "record": "GHSA-VC4V-Q632-X9G5", "field": "modified", "linked_record": true}, {"timestamp": "2026-10-25T23:00:00Z", "date_only": false, "value": 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