{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "f24e9980eb860d8600cbe5ef3d2fd9295320d229"
            },
            {
              "fixed": "b8a9fb6bf806f9c4891e71ae1beab0c07c23a877"
            },
            {
              "fixed": "826cd1de5802fd392922785f9b64d76e65d2a100"
            },
            {
              "fixed": "3b2f1937f5fce8b7dd5432e7693e3cc8b5eece56"
            },
            {
              "fixed": "70998f91030ee083ecb336a1dff0701c20a38081"
            },
            {
              "fixed": "05f90284223381005d6bcddab3fda4a97f9c3401"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.34"
            },
            {
              "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"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68154.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: reject zero bucket types in crush_decode\n\nCRUSH bucket type 0 is reserved for devices.  The mapper relies on\nthat invariant and uses type 0 to identify leaf devices.\n\nIf crush_decode() accepts a bucket with type 0, a malformed CRUSH map\ncan make the mapper treat a negative bucket ID as a device and pass it\nto is_out(), which then indexes the OSD weight array with a negative\nvalue.\n\nReject zero bucket types while decoding the CRUSH map so the invalid\nstate never reaches the mapper.",
  "id": "CVE-2026-68154",
  "modified": "2026-08-12T03:51:34.160310330Z",
  "published": "2026-08-10T11:59:20.250Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/05f90284223381005d6bcddab3fda4a97f9c3401"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3b2f1937f5fce8b7dd5432e7693e3cc8b5eece56"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/70998f91030ee083ecb336a1dff0701c20a38081"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/826cd1de5802fd392922785f9b64d76e65d2a100"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b8a9fb6bf806f9c4891e71ae1beab0c07c23a877"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68154.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68154"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "libceph: reject zero bucket types in crush_decode"
}