{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "4b6a5d9cea911424e84107df8c4eb8317938d2cd"
            },
            {
              "fixed": "790730e4d95de8356a573d4b4864486bba731863"
            },
            {
              "fixed": "2c47ebc27fa72078e26177cd458cdaf3006a9685"
            },
            {
              "fixed": "ab6c756f28c741d704a7c3e04814bfc3adf6f818"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.1.0"
            },
            {
              "fixed": "6.18.56"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98820.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-mq: set RQF_USE_SCHED when the operation is known\n\nThe cached requests are allocated for one operation but can be handed\nout for another. A passthrough command has RQF_USE_SCHED cleared, so\nusing those flags for a subsequent read/write bio will insert it into\nthe scheduler without -\u003eprepare_request() and frees it without\n-\u003efinish_request(). For kyber, this leaks the domain token acquired at\ndispatch and stalls the queue.\n\nDon't set RQF_USE_SCHED based on the first operation the batch happened\nto be allocated for. Instead, set it after the request is claimed by an\noperation. Introduce a helper function, blk_mq_rq_late_init() for this,\nand absorb blk_mq_rq_time_init() since the two run together.",
  "id": "CVE-2026-98820",
  "modified": "2026-10-20T02:31:07.466224505Z",
  "published": "2026-10-18T15:49:12.251Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2c47ebc27fa72078e26177cd458cdaf3006a9685"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/790730e4d95de8356a573d4b4864486bba731863"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab6c756f28c741d704a7c3e04814bfc3adf6f818"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98820.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98820"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "blk-mq: set RQF_USE_SCHED when the operation is known"
}