{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "6c0cedd1ef9527ef13e66875746570e76a3188a7"
            },
            {
              "fixed": "41dce4dae583a8ce06a7ebf4ce704c46a142957c"
            },
            {
              "fixed": "bb7fc2498c3bb25fa6a91f22f4760005325cfbd5"
            },
            {
              "fixed": "270277c2ab631044867adb1bd2f2433d3892de6e"
            },
            {
              "fixed": "45038e03f15e992c48603fff8c6b1c9be5397ac9"
            },
            {
              "fixed": "0e06cc511c61cff1591e5435a207759adcc76b6d"
            },
            {
              "fixed": "d3a3caf44c8ec26f5d63dc17c1c7242effa60ebc"
            },
            {
              "fixed": "901084c51a0a8fb42a3f37d2e9c62083c495f824"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.15.0"
            },
            {
              "fixed": "5.15.203"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.167"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.130"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.78"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.19"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43484.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: core: Avoid bitfield RMW for claim/retune flags\n\nMove claimed and retune control flags out of the bitfield word to\navoid unrelated RMW side effects in asynchronous contexts.\n\nThe host-\u003eclaimed bit shared a word with retune flags. Writes to claimed\nin __mmc_claim_host() or retune_now in mmc_mq_queue_rq() can overwrite\nother bits when concurrent updates happen in other contexts, triggering\nspurious WARN_ON(!host-\u003eclaimed). Convert claimed, can_retune,\nretune_now and retune_paused to bool to remove shared-word coupling.",
  "id": "CVE-2026-43484",
  "modified": "2026-07-15T01:49:09.391425712Z",
  "published": "2026-05-13T15:08:30.919Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e06cc511c61cff1591e5435a207759adcc76b6d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/270277c2ab631044867adb1bd2f2433d3892de6e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/41dce4dae583a8ce06a7ebf4ce704c46a142957c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/45038e03f15e992c48603fff8c6b1c9be5397ac9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/901084c51a0a8fb42a3f37d2e9c62083c495f824"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bb7fc2498c3bb25fa6a91f22f4760005325cfbd5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d3a3caf44c8ec26f5d63dc17c1c7242effa60ebc"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43484.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43484"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "mmc: core: Avoid bitfield RMW for claim/retune flags"
}