dm-integrity: replace forgeable discard filler with a keyed sector marker

{
  "id": "79bd8f57db9d1372ae77d88506b519e8b8afd6e8a30af59c409e972066933ae3",
  "url": "https://osv.dev/vulnerability/CVE-2026-90333",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "dm-integrity: replace forgeable discard filler with a keyed sector marker",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: dm-integrity: replace forgeable discard filler with a keyed sector marker The discard-block check in dm_integrity_rw_tag() treats a stored tag of all 0xf6 bytes (DISCARD_FILLER) as proof a block was discarded and skips HMAC verification. allow_discards is only accepted in dm-integrity's standalone mode. An attacker with raw write access to the backing device, but without the integrity key, can stamp any block with an all-0xf6 tag and have it served as authentic. Add a new \"allow_discards_keyed\" target argument that marks discarded blocks with a keyed checksum of (salt || sector) instead, computed by integrity_discard_checksum().",
    "evidence": "osv:CVE-2026-90333",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.114",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.52",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-90333",
      "aliases": [
        "CVE-2026-90333"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "84597a44a9d86ac949900441cea7da0af0f2f473"
                },
                {
                  "fixed": "388c3f6496bb8083576d989e6d249ba9807c6b0b"
                },
                {
                  "fixed": "5c58ea19a909ef6bed4f0f824e9cd7e30d7e4775"
                },
                {
                  "fixed": "6228722c27304e4682cddc1fede03898f87e4414"
                },
                {
                  "fixed": "68c5c42567bc462139128968ebbfadd0aefff519"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90333.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.7.0"
                },
                {
                  "fixed": "6.12.114"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.52"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90333.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.022794098Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/388c3f6496bb8083576d989e6d249ba9807c6b0b",
        "https://git.kernel.org/stable/c/5c58ea19a909ef6bed4f0f824e9cd7e30d7e4775",
        "https://git.kernel.org/stable/c/6228722c27304e4682cddc1fede03898f87e4414",
        "https://git.kernel.org/stable/c/68c5c42567bc462139128968ebbfadd0aefff519",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90333.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-90333",
        "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/2026/90xxx/CVE-2026-90333.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-90333",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 521914,
  "published_at": "2026-09-17T16:08:46.805+00:00"
}