{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "6d9e6dfdf3b207701471f364121c67eefb000682"
            },
            {
              "fixed": "ee41b00858ca65b4428e99efe39a4277c1f043d2"
            },
            {
              "fixed": "b67ce16b26ad0f14cfd6071013840aa95f823bea"
            },
            {
              "fixed": "205feb72e5beb3140e4e1403b6cff30cf739bab9"
            },
            {
              "fixed": "127033b79383a3e78361d7e971588aa8849f5124"
            },
            {
              "fixed": "e65848e4ce352bac9e3465099354c8b8f845391f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.6.151"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.103"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.44"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74472.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nublk: reset kernel-owned dev_info fields in ublk_ctrl_add_dev()\n\nublk_ctrl_add_dev() memcpy()s the userspace ublksrv_ctrl_dev_info into\nub-\u003edev_info and then fixes up the fields the driver owns, but misses\n-\u003estate and -\u003eublksrv_pid.\n\nA device added with -\u003estate = UBLK_S_DEV_LIVE passes the\n\"-\u003estate != UBLK_S_DEV_DEAD\" test that ublk_stop_dev_unlocked() uses as its\nproxy for \"a disk is attached\", while -\u003eub_disk is still NULL, so DEL_DEV\nright after ADD_DEV oopses in del_gendisk().  UBLK_S_DEV_QUIESCED plus\nUBLK_F_USER_RECOVERY dies one step earlier, in ublk_force_abort_dev().  A\npoisoned -\u003estate also gets START_USER_RECOVERY and the char device\nread/write path onto a device that was never started, and wedges START_DEV\nat -EEXIST.  A poisoned -\u003eublksrv_pid just makes GET_DEV_INFO report an\nunrelated task as the ublk server.\n\nReset both after the memcpy(), as ublk_detach_disk() does.  Userspace only\never reads these back, so correcting them silently breaks nothing.\n\nADD_DEV has copied -\u003estate in unsanitized since ublk was merged, but back\nthen it was harmless: the gendisk was allocated during ADD_DEV, and both\nteardown and the START_DEV -EEXIST check keyed off disk_live() rather than\n-\u003estate.  The oops became reachable once the disk allocation moved to\nSTART_DEV and those checks switched to -\u003estate.",
  "id": "CVE-2026-74472",
  "modified": "2026-08-17T03:36:32.171294212Z",
  "published": "2026-08-15T12:27:08.759Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/127033b79383a3e78361d7e971588aa8849f5124"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/205feb72e5beb3140e4e1403b6cff30cf739bab9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b67ce16b26ad0f14cfd6071013840aa95f823bea"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e65848e4ce352bac9e3465099354c8b8f845391f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ee41b00858ca65b4428e99efe39a4277c1f043d2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74472.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74472"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "ublk: reset kernel-owned dev_info fields in ublk_ctrl_add_dev()"
}