{"metadata": {"vulnerability": "CVE-2026-99174", "count": 19, "kinds": {"milestone": 7, "sighting": 1, "kev": 0, "other": 11}}, "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-2026-99174", "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-2026-99174", "record": "UBUNTU-CVE-2026-99174", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-10-28T10:35:28.758Z", "date_only": false, "value": "2026-10-28T10:35:28.758Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-99174", "field": "cveMetadata.datePublished", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-10-28T11:17:38Z", "date_only": false, "value": "2026-10-28T11:17:38Z", "kind": "other", "label": "Nvd published at", "source": "github \u00b7 GHSA-H9FX-4JCW-948X", "record": "GHSA-H9FX-4JCW-948X", "field": "database_specific.nvd_published_at"}, {"timestamp": "2026-10-28T11:17:38.030Z", "date_only": false, "value": "2026-10-28T11:17:38.030", "kind": "milestone", "label": "Published", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-99174", "record": "FKIE_CVE-2026-99174", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-10-28T11:33:42.096Z", "date_only": false, "value": "2026-10-28T11:33:42.096752Z", "kind": "sighting", "label": "Seen", "source": "https://infosec.exchange/users/cve/statuses/117518317733000519", "record": "CVE-2026-99174", "field": "creation_timestamp", "uuid": "c8c60245-1bd9-4389-8491-ae44dea9c74e", "content": "CVE-2026-99174 ext4: free the sbi after a grace period In the Linux kernel, the following vulnerability has been resolved:\next4: free the sbi after a grace period\next4_get_link() follows a symlink that keeps its target in a data blockin rcu pathwalk mode with ext4_getblk(EXT4_GET_BLOCKS_CACHED_NOWAIT).That reads s_mount_state in the ASSERT() of ext4_getblk() and again inext4_es_lookup_extent(), and the lookup bumps the extent status hit ormiss counter, all through sb->s_fs_info.\next4_put_super() destroys those counters, clears sb->s_fs_info and freesthe sbi without waiting for a grace period. A pathwalk that is still inext4_get_link() when the last reference to the mount goes away thendereferences a NULL s_fs_info, the freed sbi or the destroyed percpucounters.\nWith a pathwalk held up in ext4_get_link() while the last referencegoes away:\n  KASAN: null-ptr-deref in range [0x00000000000000a8-0x00000000000000af]  RIP: 0010:ext4_getblk+0xf0/0x640  Call Trace:   <TASK>   ext4_get_link+0x26c/0x410   pick_link+0xf96/0x1780   step_into_slowpath+0x9b8/0x1250   path_lookupat+0x484/0xb00   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\nSo far that has been hard to hit. umount(2) waits for a grace period innamespace_unlock() before it drops the mount, so only a mount whose lastreference goes away elsewhere, like the close of a file or a chdir out ofa lazily unmounted directory, can race a walker.\nKeep sb->s_fs_info and free the sbi together with the extent statuscounters after a grace period. Split the counters out ofext4_es_unregister_shrinker() for that. The shrinker still gets wastedin ext4_put_super(), the counters go with the sbi.\nhttps://www.cve.org/CVERecord?id=CVE-2026-99174https://git.kernel.org/stable/c/80d5db1686b05fad6f384be017714297d828a714https://git.kernel.org/stable/c/87d29b8b849738d52fe820d495fa0aa2d5a1ec82https://git.kernel.org/stable/c/c17b44266a1f9fcb49b894d4611d1254bf1aa313#kernel #Linux#CVE_2026_99174#bot", "url": "https://infosec.exchange/users/cve/statuses/117518317733000519"}, {"timestamp": "2026-10-28T12:31:06Z", "date_only": false, "value": "2026-10-28T12:31:06Z", "kind": "milestone", "label": "Published", "source": "github \u00b7 GHSA-H9FX-4JCW-948X", "record": "GHSA-H9FX-4JCW-948X", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-10-29T01:07:23Z", "date_only": false, "value": "2026-10-29T01:07:23.000Z", "kind": "other", "label": "Advisory revision", "source": "csaf_microsoft \u00b7 MSRC_CVE-2026-99174", "record": "MSRC_CVE-2026-99174", "field": "document.tracking.revision_history.0.date"}, {"timestamp": "2026-10-29T01:07:23Z", "date_only": false, "value": "2026-10-29T01:07:23.000Z", "kind": "other", "label": "None available", "source": "csaf_microsoft \u00b7 MSRC_CVE-2026-99174", "record": "MSRC_CVE-2026-99174", "field": "vulnerabilities.0.remediations.0.date"}, {"timestamp": "2026-10-29T01:07:23Z", "date_only": false, "value": "2026-10-29T01:07:23.000Z", "kind": "milestone", "label": "Published", "source": "csaf_microsoft \u00b7 MSRC_CVE-2026-99174", "record": "MSRC_CVE-2026-99174", "field": "document.tracking.initial_release_date", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-10-29T01:07:23Z", "date_only": false, "value": "2026-10-29T01:07:23.000Z", "kind": "other", "label": "Updated", "source": "csaf_microsoft \u00b7 MSRC_CVE-2026-99174", "record": "MSRC_CVE-2026-99174", "field": "document.tracking.current_release_date"}, {"timestamp": "2026-10-29T07:00:29.385Z", "date_only": false, "value": "2026-10-29T07:00:29.385Z", "kind": "other", "label": "Document generated", "source": "csaf_microsoft \u00b7 MSRC_CVE-2026-99174", "record": "MSRC_CVE-2026-99174", "field": "document.tracking.generator.date"}, {"timestamp": "2026-10-30T06:06:44.237Z", "date_only": false, "value": "2026-10-30T06:06:44.237618Z", "kind": "milestone", "label": "Published", "source": "osv_bellsoft \u00b7 BELL-CVE-2026-99174", "record": "BELL-CVE-2026-99174", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-10-30T06:30:43Z", "date_only": false, "value": "2026-10-30T06:30:43Z", "kind": "other", "label": "Updated", "source": "osv_ubuntu \u00b7 UBUNTU-CVE-2026-99174", "record": "UBUNTU-CVE-2026-99174", "field": "modified"}, {"timestamp": "2026-10-30T06:35:40.548Z", "date_only": false, "value": "2026-10-30T06:35:40.548364Z", "kind": "other", "label": "Updated", "source": "osv_bellsoft \u00b7 BELL-CVE-2026-99174", "record": "BELL-CVE-2026-99174", 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