{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "540c801c65eb58e05e0ca38b6fd644a83d7e2b33"
            },
            {
              "fixed": "c84ad7407fb16b92d9b7a649cc304a9cf3757897"
            },
            {
              "fixed": "f56b2bb4b18b017b056c4c17c66b2c4c54bf6ee4"
            },
            {
              "fixed": "52200fc41a79da430ccf7c126ed837535b087ea2"
            },
            {
              "fixed": "4ed7f3d7d435bf5b63da2814dc9270f5ba896011"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.5.0"
            },
            {
              "fixed": "6.12.111"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.53"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98056.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: remove stale namespaces by NSID range during scan\n\nnvme_scan_ns_list() drops the stale namespaces in each gap in the\nreported NSID list one NSID at a time. Every iteration calls\nnvme_find_get_ns() to look the namespace up and removes it if it is\npresent. The loop runs once per NSID in the gap rather than once per\nnamespace actually present.\n\nNSIDs are 32-bit, so a target with a sparse NSID space can make a\nsingle gap spin the loop billions of times with nothing to remove.\n\n  watchdog: BUG: soft lockup - CPU#4 stuck for 26s!\n  Workqueue: nvme-wq nvme_scan_work [nvme_core]\n  RIP: 0010:__srcu_read_unlock+0xb/0x20\n  Call Trace:\n   nvme_find_get_ns+0x7d/0xb0 [nvme_core]\n   nvme_scan_ns_list+0xe8/0x280 [nvme_core]\n   nvme_scan_work+0x18a/0x280 [nvme_core]\n   process_one_work+0x197/0x380\n   worker_thread+0x2fe/0x410\n   kthread+0xe0/0x100\n\nRename nvme_remove_invalid_namespaces() to nvme_remove_nsid_range()\nand give it an open (start, end) NSID range. ctrl-\u003enamespaces is\nsorted by NSID, so the whole gap is dropped in a single walk that\nstops once end is reached. This bounds the work by the namespaces\nthat are present instead of by the size of the gap.",
  "id": "CVE-2026-98056",
  "modified": "2026-09-27T03:30:32.625515829Z",
  "published": "2026-09-25T10:24:02.919Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ed7f3d7d435bf5b63da2814dc9270f5ba896011"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/52200fc41a79da430ccf7c126ed837535b087ea2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c84ad7407fb16b92d9b7a649cc304a9cf3757897"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f56b2bb4b18b017b056c4c17c66b2c4c54bf6ee4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98056.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98056"
    },
    {
      "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:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "nvme: remove stale namespaces by NSID range during scan"
}