{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "eec40579d84873dfb7021eb24c50360f073237c5"
            },
            {
              "fixed": "54dd21ca945ecc07885012b9f3e8197f091cfba0"
            },
            {
              "fixed": "ef00efb6fcaee88f50891279ceced17c614e97f7"
            },
            {
              "fixed": "e9fa68b89214bc65af0ef963af7ec3cce9f866e0"
            },
            {
              "fixed": "dc731d7fddfd6149f5e88ea080475d18c36d3c64"
            },
            {
              "fixed": "d66ceeefb87ddb097b0546bafc581380b816b048"
            },
            {
              "fixed": "36ff918637e3517f732188a3c39dbeae5b9cfb1b"
            },
            {
              "fixed": "6876ca330e741fb8886d12070cb6a7f9cb67257e"
            },
            {
              "fixed": "39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.15.0"
            },
            {
              "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-2026-89576.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm-era: fix shadowed superblock leak on take-snap failure\n\nmetadata_take_snap() bumps the live superblock refcount and then\ndm_tm_shadow_block() allocates a new block for the metadata snapshot.\nIf the subsequent dm_sm_inc_block() of writeset_tree_root or\nera_array_root fails, the function only unlocks the clone and\nreturns.  The newly allocated shadow block is never returned to the\nmetadata space map, so each failed take-snap permanently leaks one\nmetadata block.\n\nFree the clone with dm_sm_dec_block() on those error paths, matching\nthe final step of metadata_drop_snap().",
  "id": "CVE-2026-89576",
  "modified": "2026-09-16T03:31:01.774096377Z",
  "published": "2026-09-11T19:44:43.777Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/36ff918637e3517f732188a3c39dbeae5b9cfb1b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/54dd21ca945ecc07885012b9f3e8197f091cfba0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6876ca330e741fb8886d12070cb6a7f9cb67257e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d66ceeefb87ddb097b0546bafc581380b816b048"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc731d7fddfd6149f5e88ea080475d18c36d3c64"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e9fa68b89214bc65af0ef963af7ec3cce9f866e0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ef00efb6fcaee88f50891279ceced17c614e97f7"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89576.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89576"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "dm-era: fix shadowed superblock leak on take-snap failure"
}