{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "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:  landlock: Fix use-after-free of the source's parent directory  current_check_refer_path() reads old_dentry-\u003ed_parent without holding a reference nor a lock on it, and then dereferences it in collect_domain_accesses() and in the audit record.  A reference on a child does not pin its parent: __d_move() reassigns dentry-\u003ed_parent and drops the reference the child held on its former parent.  hook_path_rename() is not affected because the rename path calls lock_rename() before the hook, so the source cannot be reparented under it.  hook_path_link() has no such protection: filename_linkat() holds a reference on the source dentry but neither locks nor references its parent, so a concurrent rename(2) can reparent the source while security_path_link() runs, and the former parent can then be removed and freed while the hook walks it.  A process can trigger this after entering a Landlock domain that handles at least one filesystem access right.  The process can then race a linkat(2) loop against rename(2) and rmdir(2):    BUG: KASAN: slab-use-after-free in collect_domain_accesses+0x278/0x290   Read of size 4 at addr ffff888160bd53f4 by task llrepro2/549    collect_domain_accesses+0x278/0x290    current_check_refer_path+0x952/0x1120    security_path_link+0x1be/0x320    filename_linkat+0x342/0x6d0    __x64_sys_linkat+0xfa/0x150   Freed by task 562:    kmem_cache_free+0x139/0x4c0    i_callback+0x4b/0x80    rcu_core+0x7dc/0x10a0  Take a reference on the dentry selected as the source parent, using dget() for the common-mount-root case and dget_parent() otherwise. Release it after the hierarchy walk and synchronous audit logging.  [mic: Clarify the caller, reachability, and reference handling]",
  "id": "DEBIAN-CVE-2026-97594",
  "modified": "2026-09-26T04:47:42.912056598Z",
  "published": "2026-09-25T11:17:10.653Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-97594"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-97594"
  ]
}