{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc"
            },
            {
              "fixed": "9cac21f8eb82675ed19fb955b8bbb9dd14cc3d58"
            },
            {
              "fixed": "b322cc7adcd2e6ec1594d187533a126506ab545c"
            },
            {
              "fixed": "695c85dc345a4e0292739f004c261bedef3f27e6"
            },
            {
              "fixed": "01b0ec8c397be65ff710777c97017ca1de56ef8e"
            },
            {
              "fixed": "cf37b61b5420fd4600fe78cf8c24da6e4d9bfe28"
            },
            {
              "fixed": "636a99bab36ba27515363d325866c0273ac83b3e"
            },
            {
              "fixed": "583cf579b32d99e3fe4e9c8ecc4d852e3708fbec"
            },
            {
              "fixed": "783f0f0974c156aca630f4ffff248671082a098d"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.3.0"
            },
            {
              "fixed": "5.10.270"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.109"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.50"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89643.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\naudit: avoid dropping live tree ref on fsnotify rule autoremove\n\naudit_del_rule() is used for both netlink deletion templates and internal\nfsnotify autoremove.  The former passes a parsed template which owns a\ntemporary tree reference; the latter passes the installed entry itself.\n\nThe unconditional audit_put_tree() at the end of audit_del_rule() assumes\nthe template case.  For mixed AUDIT_DIR plus AUDIT_EXE rules, an fsnotify\nautoremove event therefore drops the installed rule's live tree reference.\nRepeating this across rules sharing the same tree can free the tree while\nanother rule still references it, and a later autoremove dereferences the\nfreed pathname while comparing rules.\n\nMove the temporary-tree put to audit_rule_change(), the caller that owns\ndeletion templates.  Keep it in the AUDIT_DEL_RULE cleanup so both\nsuccessful deletion and -ENOENT still release the parser-owned tree.\n\n[PM: dropped unnecessary comment for line length reasons]",
  "id": "CVE-2026-89643",
  "modified": "2026-09-16T03:30:55.545717954Z",
  "published": "2026-09-11T19:45:35.523Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/01b0ec8c397be65ff710777c97017ca1de56ef8e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/583cf579b32d99e3fe4e9c8ecc4d852e3708fbec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/636a99bab36ba27515363d325866c0273ac83b3e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/695c85dc345a4e0292739f004c261bedef3f27e6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/783f0f0974c156aca630f4ffff248671082a098d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9cac21f8eb82675ed19fb955b8bbb9dd14cc3d58"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b322cc7adcd2e6ec1594d187533a126506ab545c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf37b61b5420fd4600fe78cf8c24da6e4d9bfe28"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89643.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89643"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "audit: avoid dropping live tree ref on fsnotify rule autoremove"
}