{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  ntfs3: free the sbi after a grace period  If the \"nocase\" mount option ntfs3 uses custom hash and dentry compare functions. Both access ntfs3 superblock private information in rcu pathwalk. ntfs_put_super() and ntfs3_kill_sb() drop the info without any rcu delay. A lookup that's still inside the filesystem when the last reference to the mount is dropped causes a UAF. With a pathwalk held up in ntfs_d_hash() while the last reference to the mount goes away:    BUG: KASAN: slab-use-after-free in ntfs_nls_to_utf16+0x752/0x940   Read of size 8 at addr ff1100010453c850 by task walker/99   Call Trace:    \u003cTASK\u003e    ntfs_nls_to_utf16+0x752/0x940    ntfs_d_hash+0x22b/0x500    link_path_walk+0x11ad/0x1d30    path_lookupat+0x63/0xb00    filename_lookup+0x1f1/0x5b0    vfs_statx+0xd7/0x3b0   [...]   Allocated by task 95:    __kmalloc_cache_noprof+0x249/0x560    ntfs_init_fs_context+0x2db/0x5a0    alloc_fs_context+0x52e/0xc70   [...]   Freed by task 98:    kfree+0x1db/0x5b0    deactivate_locked_super+0x9c/0xf0    cleanup_mnt+0x9f/0x130    task_work_run+0x131/0x250  The bug is currently masked by the grace period in namespace_unlock() for umount(2). Keep the necessary information until the filesystem private info is freed and free it with an rcu delay.  ntfs3_free_sbi() now runs from an rcu callback and drops the upcase table via ntfs_put_shared(). So switch s_shared_lock over to spin_lock_bh(). Otherwise the callback can deadlock against a task holding the lock on the same cpu.",
  "id": "DEBIAN-CVE-2026-99171",
  "modified": "2026-10-29T05:47:36.521681597Z",
  "published": "2026-10-28T11:17:37.660Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-99171"
    }
  ],
  "upstream": [
    "CVE-2026-99171"
  ]
}