audit: fix recursive locking deadlock in audit_dupe_exe()

{
  "id": "d085a5e8a39104cc4284d34bcdf249b036f80411109df09bc07b93fe89d1545d",
  "url": "https://osv.dev/vulnerability/CVE-2026-68096",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "audit: fix recursive locking deadlock in audit_dupe_exe()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: audit: fix recursive locking deadlock in audit_dupe_exe() A deadlock occurs in the audit subsystem when duplicating executable-related rules. When a file is moved (e.g., via do_renameat2()), the VFS layer locks the parent directory (I_MUTEX_PARENT), which synchronously triggers an fsnotify_move event. If an existing executable audit rule matches the file being moved, the audit subsystem catches this event and calls audit_dupe_exe() to duplicate the watch and update the rule. Then, audit_alloc_mark() would call kern_path_parent() to resolve the path, leading to a blind attempt to acquire the exact same I_MUTEX_PARENT lock already held by the task, resulting in the following recursive locking deadlock: ============================================ WARNING: possible recursive locking detected 6.12.0-55.27.1.el10_0.x86_64+debug #1 Not tainted -------------------------------------------- mv/5099 is trying to acquire lock: ffff888132845358 (&inode->i_sb->s_type->i_mutex_dir_key/1){+.+.}-{3:3}, at: __kern_path_locked+0x10a/0x2f0 but task is already holding lock: ffff888132846b58 (&inode->i_sb->s_type->i_mutex_dir_key/1){+.+.}-{3:3}, at: lock_two_directories+0x13f/0x2b0 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&inode->i_sb->s_type->i_mutex_dir_key/1); lock(&inode->i_sb->s_type->i_mutex_dir_key/1); *** DEADLOCK *** May be due to missing lock nesting notation 6 locks hel",
    "evidence": "osv:CVE-2026-68096",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.266",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.217",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.184",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.148",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.101",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.42",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-68096",
      "aliases": [
        "CVE-2026-68096"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc"
                },
                {
                  "fixed": "6114c3f21eb2ae175401736da744b684705e7ed9"
                },
                {
                  "fixed": "f6fda0ac6661c23b8356dfb1cc423960cc6f0593"
                },
                {
                  "fixed": "3bbb4931f7cd84cecf29ec222c0732bf9ad4da9f"
                },
                {
                  "fixed": "36eb77f14b4e6f2dc1008c1fabe31236397be27a"
                },
                {
                  "fixed": "7d1f66c69898ffb1a718926c32a777ecc471caca"
                },
                {
                  "fixed": "40879c39d6740f3dddfb52b5d6ba7fb8cceb84d8"
                },
                {
                  "fixed": "3b601938314c24fcd1afb6659cad92fe96c9c2f8"
                },
                {
                  "fixed": "81905b5acbe77284734438df3fbec1158e6429a3"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68096.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.3.0"
                },
                {
                  "fixed": "5.10.266"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.217"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.184"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.148"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.101"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.42"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68096.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:21.532671177Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/36eb77f14b4e6f2dc1008c1fabe31236397be27a",
        "https://git.kernel.org/stable/c/3b601938314c24fcd1afb6659cad92fe96c9c2f8",
        "https://git.kernel.org/stable/c/3bbb4931f7cd84cecf29ec222c0732bf9ad4da9f",
        "https://git.kernel.org/stable/c/40879c39d6740f3dddfb52b5d6ba7fb8cceb84d8",
        "https://git.kernel.org/stable/c/6114c3f21eb2ae175401736da744b684705e7ed9",
        "https://git.kernel.org/stable/c/7d1f66c69898ffb1a718926c32a777ecc471caca",
        "https://git.kernel.org/stable/c/81905b5acbe77284734438df3fbec1158e6429a3",
        "https://git.kernel.org/stable/c/f6fda0ac6661c23b8356dfb1cc423960cc6f0593",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68096.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-68096",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68096.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-68096",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 487815,
  "published_at": "2026-08-10T11:58:09.951+00:00"
}