{"metadata": {"vulnerability": "CVE-2026-99173", "count": 14, "kinds": {"milestone": 6, "sighting": 1, "kev": 0, "other": 7}}, "data": [{"timestamp": "2026-09-25T10:25:14.399Z", "date_only": false, "value": "2026-09-25T10:25:14.399Z", "kind": "milestone", "label": "Reserved", "source": "cvelistv5", "record": "CVE-2026-99173", "field": "cveMetadata.dateReserved"}, {"timestamp": "2026-10-28T00:00:00Z", "date_only": false, "value": "2026-10-28T00:00:00Z", "kind": "milestone", "label": "Published", "source": "osv_ubuntu \u00b7 UBUNTU-CVE-2026-99173", "record": "UBUNTU-CVE-2026-99173", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-28T10:35:28.017Z", "date_only": false, "value": "2026-10-28T10:35:28.017Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-99173", "field": "cveMetadata.datePublished", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-10-28T11:17:37Z", "date_only": false, "value": "2026-10-28T11:17:37Z", "kind": "other", "label": "Nvd published at", "source": "github \u00b7 GHSA-FX9F-7WC6-CJJX", "record": "GHSA-FX9F-7WC6-CJJX", "field": "database_specific.nvd_published_at", "linked_record": true}, {"timestamp": "2026-10-28T11:17:37.900Z", "date_only": false, "value": "2026-10-28T11:17:37.900", "kind": "milestone", "label": "Published", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-99173", "record": "FKIE_CVE-2026-99173", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-28T11:33:01.480Z", "date_only": false, "value": "2026-10-28T11:33:01.480126Z", "kind": "sighting", "label": "Seen", "source": "https://infosec.exchange/users/cve/statuses/117518315089636275", "record": "CVE-2026-99173", "field": "creation_timestamp", "uuid": "4f2e531f-b061-4f91-96d3-a246e9f33e35", "content": "CVE-2026-99173 eventfs: Free the eventfs_inode after an rcu grace period too In the Linux kernel, the following vulnerability has been resolved:\neventfs: Free the eventfs_inode after an rcu grace period too\ntracefs_d_revalidate() reads ->is_freed of the eventfs_inode thatdentry->d_fsdata points to, and ->d_revalidate() is called in rcupathwalk mode with nothing but rcu_read_lock() held. The dentry itselfstays around for such a walker, but tracefs_d_release() drops itsreference to the eventfs_inode when the dentry is killed, andrelease_ei() then frees it after a grace period of eventfs_srcu. AnSRCU grace period doesn't wait for rcu_read_lock() sections, so thewalker can read an eventfs_inode that is already gone.\nWith a pathwalk held up in tracefs_d_revalidate() while the dentry goesaway:\n  BUG: KASAN: slab-use-after-free in tracefs_d_revalidate+0x76/0x90  Read of size 1 at addr ff1100010152d8d0 by task walker/97  Call Trace:   <TASK>   tracefs_d_revalidate+0x76/0x90   lookup_fast+0x320/0x640   path_lookupat+0x160/0xb00   filename_lookup+0x1f1/0x5b0   vfs_statx+0xd7/0x3b0   vfs_fstatat+0x4d/0x90   __do_sys_newfstatat+0xa0/0x100   do_syscall_64+0x10e/0x5e0   entry_SYSCALL_64_after_hwframe+0x77/0x7f  [...]  Allocated by task 1:   __kmalloc_cache_noprof+0x249/0x560   eventfs_create_dir+0x7a/0x590   event_create_dir+0x2fb/0xcf0   trace_add_event_call+0xbf/0x150  [...]  Freed by task 11:   kfree+0x1db/0x5b0   srcu_invoke_callbacks+0x3a3/0x620   process_one_work+0x937/0x1810   worker_thread+0x4f1/0xd60\nBefore commit 8e556432477e (\"eventfs: Use SRCU for freeingeventfs_inodes\") release_ei() used call_rcu(), which covered the walker,while eventfs_iterate() needs the SRCU grace period. Wait for both andchain call_rcu() from the SRCU callback.\nhttps://www.cve.org/CVERecord?id=CVE-2026-99173https://git.kernel.org/stable/c/4586ef24ce390e8becb9f3e5852d5d3978b01c33https://git.kernel.org/stable/c/45fcfd5d9c10e0aa977ed5b9bd445707e01bb107https://git.kernel.org/stable/c/2cd88c498ecff8e22bf4c397b8eb226db70ac343#kernel #Linux#CVE_2026_99173#bot", "url": "https://infosec.exchange/users/cve/statuses/117518315089636275"}, {"timestamp": "2026-10-28T12:31:06Z", "date_only": false, "value": "2026-10-28T12:31:06Z", "kind": "milestone", "label": "Published", "source": "github \u00b7 GHSA-FX9F-7WC6-CJJX", "record": "GHSA-FX9F-7WC6-CJJX", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-30T06:06:44.175Z", "date_only": false, "value": "2026-10-30T06:06:44.175095Z", "kind": "milestone", "label": "Published", "source": "osv_bellsoft \u00b7 BELL-CVE-2026-99173", "record": "BELL-CVE-2026-99173", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-31T12:44:40.199Z", "date_only": false, "value": "2026-10-31T12:44:40.199Z", "kind": "other", "label": "Updated", "source": "cvelistv5", "record": "CVE-2026-99173", "field": "cveMetadata.dateUpdated"}, {"timestamp": "2026-10-31T12:44:40.199Z", "date_only": false, "value": "2026-10-31T12:44:40.199Z", "kind": "other", "label": "Updated", "source": "cvelistv5 / Linux", "record": "CVE-2026-99173", "field": "containers.cna.providerMetadata.dateUpdated"}, {"timestamp": "2026-10-31T13:17:58.723Z", "date_only": false, "value": "2026-10-31T13:17:58.723", "kind": "other", "label": "Updated", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-99173", "record": "FKIE_CVE-2026-99173", "field": "lastModified", "linked_record": true}, {"timestamp": "2026-10-31T15:30:23Z", "date_only": false, "value": "2026-10-31T15:30:23Z", "kind": "other", "label": "Updated", "source": "github \u00b7 GHSA-FX9F-7WC6-CJJX", "record": "GHSA-FX9F-7WC6-CJJX", "field": "modified", "linked_record": true}, {"timestamp": "2026-11-03T06:24:04.683Z", "date_only": false, "value": "2026-11-03T06:24:04.683130Z", "kind": "other", "label": "Updated", "source": "osv_bellsoft \u00b7 BELL-CVE-2026-99173", "record": "BELL-CVE-2026-99173", "field": "modified", "linked_record": true}, {"timestamp": "2026-11-03T18:16:17Z", "date_only": false, "value": "2026-11-03T18:16:17Z", "kind": "other", "label": "Updated", "source": "osv_ubuntu \u00b7 UBUNTU-CVE-2026-99173", "record": "UBUNTU-CVE-2026-99173", "field": "modified", "linked_record": true}], "metrics": {"as_of": "2026-11-04T14:38:37.570Z", "anchors": {"origin": {"timestamp": "2026-10-28T00:00:00Z", "date_only": false, "value": "2026-10-28T00:00:00Z", "kind": "milestone", "label": "Published", "source": "osv_ubuntu \u00b7 UBUNTU-CVE-2026-99173", "record": "UBUNTU-CVE-2026-99173", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, "discovery": null, "report": null, "acknowledgement": null, "disclosure": {"timestamp": "2026-10-28T00:00:00Z", "date_only": false, "value": "2026-10-28T00:00:00Z", "kind": "milestone", "label": "Published", "source": "osv_ubuntu \u00b7 UBUNTU-CVE-2026-99173", "record": "UBUNTU-CVE-2026-99173", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, "exploit_publication": null, "exploitation": null, "patch": null}, "vendor_response_time": {"available": false, "missing": ["start", "end"]}, "time_to_exploit": {"available": false, "missing": ["end"]}, "disclosure_to_exploit": {"available": false, "missing": ["end"]}, "disclosure_to_exploit_publication": {"available": false, "missing": ["end"]}, "time_to_patch": {"available": false, "missing": ["start", "end"]}, "total_time_to_patch": {"available": false, "missing": ["start", "end"]}, "disclosure_to_patch": {"available": false, "missing": ["end"]}, "time_unpatched": {"available": true, "seconds": 657517.570313, "hours": 182.6437695313889, "days": 7.61015706380787, "min_seconds": 571117.570313, "max_seconds": 657517.570313, "approximate": true, "ongoing": true, "order_known": true, "batch_listing": false, "end_before_start": false, "start": {"timestamp": "2026-10-28T00:00:00Z", "date_only": false, "value": "2026-10-28T00:00:00Z", "kind": "milestone", "label": "Published", "source": "osv_ubuntu \u00b7 UBUNTU-CVE-2026-99173", "record": "UBUNTU-CVE-2026-99173", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, "end": {"timestamp": "2026-11-04T14:38:37.570Z", "date_only": false, "label": "As of", "source": "Calculation clock"}}, "exploitation_to_patch": {"available": false, "missing": ["start"]}, "exploit_publication_to_patch": {"available": false, "missing": ["start"]}}}