{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/block/ublk_drv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "72e28774e9644c2bdbb4920842fbf77103a15a85",
              "status": "affected",
              "version": "63dfbcd59b4b823eac4441efff10b1c303c8f49f",
              "versionType": "git"
            },
            {
              "lessThan": "f0d385f6689f37a2828c686fb279121df006b4cb",
              "status": "affected",
              "version": "7fc4da6a304bdcd3de14fc946dc2c19437a9cc5a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/block/ublk_drv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19-rc4"
            },
            {
              "lessThan": "6.19-rc4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19-rc5",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.6",
                  "versionStartIncluding": "6.18.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19-rc5",
                  "versionStartIncluding": "6.19-rc4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nublk: fix use-after-free in ublk_partition_scan_work\n\nA race condition exists between the async partition scan work and device\nteardown that can lead to a use-after-free of ub-\u003eub_disk:\n\n1. ublk_ctrl_start_dev() schedules partition_scan_work after add_disk()\n2. ublk_stop_dev() calls ublk_stop_dev_unlocked() which does:\n   - del_gendisk(ub-\u003eub_disk)\n   - ublk_detach_disk() sets ub-\u003eub_disk = NULL\n   - put_disk() which may free the disk\n3. The worker ublk_partition_scan_work() then dereferences ub-\u003eub_disk\n   leading to UAF\n\nFix this by using ublk_get_disk()/ublk_put_disk() in the worker to hold\na reference to the disk during the partition scan. The spinlock in\nublk_get_disk() synchronizes with ublk_detach_disk() ensuring the worker\neither gets a valid reference or sees NULL and exits early.\n\nAlso change flush_work() to cancel_work_sync() to avoid running the\npartition scan work unnecessarily when the disk is already detached."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-23T15:24:15.684Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/72e28774e9644c2bdbb4920842fbf77103a15a85"
        },
        {
          "url": "https://git.kernel.org/stable/c/f0d385f6689f37a2828c686fb279121df006b4cb"
        }
      ],
      "title": "ublk: fix use-after-free in ublk_partition_scan_work",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-22995",
    "datePublished": "2026-01-23T15:24:15.684Z",
    "dateReserved": "2026-01-13T15:37:45.938Z",
    "dateUpdated": "2026-01-23T15:24:15.684Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-22995\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-23T16:15:55.603\",\"lastModified\":\"2026-01-26T15:03:33.357\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nublk: fix use-after-free in ublk_partition_scan_work\\n\\nA race condition exists between the async partition scan work and device\\nteardown that can lead to a use-after-free of ub-\u003eub_disk:\\n\\n1. ublk_ctrl_start_dev() schedules partition_scan_work after add_disk()\\n2. ublk_stop_dev() calls ublk_stop_dev_unlocked() which does:\\n   - del_gendisk(ub-\u003eub_disk)\\n   - ublk_detach_disk() sets ub-\u003eub_disk = NULL\\n   - put_disk() which may free the disk\\n3. The worker ublk_partition_scan_work() then dereferences ub-\u003eub_disk\\n   leading to UAF\\n\\nFix this by using ublk_get_disk()/ublk_put_disk() in the worker to hold\\na reference to the disk during the partition scan. The spinlock in\\nublk_get_disk() synchronizes with ublk_detach_disk() ensuring the worker\\neither gets a valid reference or sees NULL and exits early.\\n\\nAlso change flush_work() to cancel_work_sync() to avoid running the\\npartition scan work unnecessarily when the disk is already detached.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/72e28774e9644c2bdbb4920842fbf77103a15a85\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f0d385f6689f37a2828c686fb279121df006b4cb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}