CVE-2025-68372 (GCVE-0-2025-68372)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:33 – Updated: 2026-06-16 19:28
VLAI
Title
nbd: defer config put in recv_work
Summary
In the Linux kernel, the following vulnerability has been resolved: nbd: defer config put in recv_work There is one uaf issue in recv_work when running NBD_CLEAR_SOCK and NBD_CMD_RECONFIGURE: nbd_genl_connect // conf_ref=2 (connect and recv_work A) nbd_open // conf_ref=3 recv_work A done // conf_ref=2 NBD_CLEAR_SOCK // conf_ref=1 nbd_genl_reconfigure // conf_ref=2 (trigger recv_work B) close nbd // conf_ref=1 recv_work B config_put // conf_ref=0 atomic_dec(&config->recv_threads); -> UAF Or only running NBD_CLEAR_SOCK: nbd_genl_connect // conf_ref=2 nbd_open // conf_ref=3 NBD_CLEAR_SOCK // conf_ref=2 close nbd nbd_release config_put // conf_ref=1 recv_work config_put // conf_ref=0 atomic_dec(&config->recv_threads); -> UAF Commit 87aac3a80af5 ("nbd: call nbd_config_put() before notifying the waiter") moved nbd_config_put() to run before waking up the waiter in recv_work, in order to ensure that nbd_start_device_ioctl() would not be woken up while nbd->task_recv was still uncleared. However, in nbd_start_device_ioctl(), after being woken up it explicitly calls flush_workqueue() to make sure all current works are finished. Therefore, there is no need to move the config put ahead of the wakeup. Move nbd_config_put() to the end of recv_work, so that the reference is held for the whole lifetime of the worker thread. This makes sure the config cannot be freed while recv_work is still running, even if clear + reconfigure interleave. In addition, we don't need to worry about recv_work dropping the last nbd_put (which causes deadlock): path A (netlink with NBD_CFLAG_DESTROY_ON_DISCONNECT): connect // nbd_refs=1 (trigger recv_work) open nbd // nbd_refs=2 NBD_CLEAR_SOCK close nbd nbd_release nbd_disconnect_and_put flush_workqueue // recv_work done nbd_config_put nbd_put // nbd_refs=1 nbd_put // nbd_refs=0 queue_work path B (netlink without NBD_CFLAG_DESTROY_ON_DISCONNECT): connect // nbd_refs=2 (trigger recv_work) open nbd // nbd_refs=3 NBD_CLEAR_SOCK // conf_refs=2 close nbd nbd_release nbd_config_put // conf_refs=1 nbd_put // nbd_refs=2 recv_work done // conf_refs=0, nbd_refs=1 rmmod // nbd_refs=0 Depends-on: e2daec488c57 ("nbd: Fix hungtask when nbd_config_put")
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 87aac3a80af5cbad93e63250e8a1e19095ba0d30 , < 198aa230a6f8c1f6af7ed26b29180749c3e79e4d (git)
Affected: 87aac3a80af5cbad93e63250e8a1e19095ba0d30 , < d3ba312675911ff9e3fefefd551751e153a9f0a9 (git)
Affected: 87aac3a80af5cbad93e63250e8a1e19095ba0d30 , < 3692884bd6187d89d41eef81e5a9724519fd01c1 (git)
Affected: 87aac3a80af5cbad93e63250e8a1e19095ba0d30 , < 1ba2ced2bbdf7e64a30c3e88c70ea8bc208d1509 (git)
Affected: 87aac3a80af5cbad93e63250e8a1e19095ba0d30 , < 6b69593f72e1bfba6ca47ca8d9b619341fded7d6 (git)
Affected: 87aac3a80af5cbad93e63250e8a1e19095ba0d30 , < 443a1721806b6ff6303b5229e9811d68172d622f (git)
Affected: 87aac3a80af5cbad93e63250e8a1e19095ba0d30 , < 742012f6bf29553fdc460bf646a58df3a7b43d01 (git)
Affected: 87aac3a80af5cbad93e63250e8a1e19095ba0d30 , < 9517b82d8d422d426a988b213fdd45c6b417b86d (git)
Affected: 0a4e383fc3aa6540f804c4fd1184a96ae5de6ef8 (git)
Affected: 2ef6f4bd60411934e3fc2715442c2afe70f84bf3 (git)
Affected: 742fd49cf811ca164489e339b862e3fb8e240a73 (git)
Affected: 14df8724aeeef338172e2a2d6efadc989921ca0f (git)
Affected: 4.14.204 , < 4.15 (semver)
Affected: 4.19.155 , < 4.20 (semver)
Affected: 5.4.75 , < 5.5 (semver)
Affected: 5.9.5 , < 5.10 (semver)
Create a notification for this product.
Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.10.248 , ≤ 5.10.* (semver)
Unaffected: 5.15.198 , ≤ 5.15.* (semver)
Unaffected: 6.1.160 , ≤ 6.1.* (semver)
Unaffected: 6.6.120 , ≤ 6.6.* (semver)
Unaffected: 6.12.63 , ≤ 6.12.* (semver)
Unaffected: 6.17.13 , ≤ 6.17.* (semver)
Unaffected: 6.18.2 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: defer config put in recv_work\n\nThere is one uaf issue in recv_work when running NBD_CLEAR_SOCK and\nNBD_CMD_RECONFIGURE:\n  nbd_genl_connect     // conf_ref=2 (connect and recv_work A)\n  nbd_open\t       // conf_ref=3\n  recv_work A done     // conf_ref=2\n  NBD_CLEAR_SOCK       // conf_ref=1\n  nbd_genl_reconfigure // conf_ref=2 (trigger recv_work B)\n  close nbd\t       // conf_ref=1\n  recv_work B\n    config_put         // conf_ref=0\n    atomic_dec(\u0026config-\u003erecv_threads); -\u003e UAF\n\nOr only running NBD_CLEAR_SOCK:\n  nbd_genl_connect   // conf_ref=2\n  nbd_open \t     // conf_ref=3\n  NBD_CLEAR_SOCK     // conf_ref=2\n  close nbd\n    nbd_release\n      config_put     // conf_ref=1\n  recv_work\n    config_put \t     // conf_ref=0\n    atomic_dec(\u0026config-\u003erecv_threads); -\u003e UAF\n\nCommit 87aac3a80af5 (\"nbd: call nbd_config_put() before notifying the\nwaiter\") moved nbd_config_put() to run before waking up the waiter in\nrecv_work, in order to ensure that nbd_start_device_ioctl() would not\nbe woken up while nbd-\u003etask_recv was still uncleared.\n\nHowever, in nbd_start_device_ioctl(), after being woken up it explicitly\ncalls flush_workqueue() to make sure all current works are finished.\nTherefore, there is no need to move the config put ahead of the wakeup.\n\nMove nbd_config_put() to the end of recv_work, so that the reference is\nheld for the whole lifetime of the worker thread. This makes sure the\nconfig cannot be freed while recv_work is still running, even if clear\n+ reconfigure interleave.\n\nIn addition, we don\u0027t need to worry about recv_work dropping the last\nnbd_put (which causes deadlock):\n\npath A (netlink with NBD_CFLAG_DESTROY_ON_DISCONNECT):\n  connect  // nbd_refs=1 (trigger recv_work)\n  open nbd // nbd_refs=2\n  NBD_CLEAR_SOCK\n  close nbd\n    nbd_release\n      nbd_disconnect_and_put\n        flush_workqueue // recv_work done\n      nbd_config_put\n        nbd_put // nbd_refs=1\n      nbd_put // nbd_refs=0\n        queue_work\n\npath B (netlink without NBD_CFLAG_DESTROY_ON_DISCONNECT):\n  connect  // nbd_refs=2 (trigger recv_work)\n  open nbd // nbd_refs=3\n  NBD_CLEAR_SOCK // conf_refs=2\n  close nbd\n    nbd_release\n      nbd_config_put // conf_refs=1\n      nbd_put // nbd_refs=2\n  recv_work done // conf_refs=0, nbd_refs=1\n  rmmod // nbd_refs=0\n\nDepends-on: e2daec488c57 (\"nbd: Fix hungtask when nbd_config_put\")"
        }
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        "dateUpdated": "2026-05-23T16:02:46.914Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/198aa230a6f8c1f6af7ed26b29180749c3e79e4d"
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          "url": "https://git.kernel.org/stable/c/d3ba312675911ff9e3fefefd551751e153a9f0a9"
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          "url": "https://git.kernel.org/stable/c/443a1721806b6ff6303b5229e9811d68172d622f"
        },
        {
          "url": "https://git.kernel.org/stable/c/742012f6bf29553fdc460bf646a58df3a7b43d01"
        },
        {
          "url": "https://git.kernel.org/stable/c/9517b82d8d422d426a988b213fdd45c6b417b86d"
        }
      ],
      "title": "nbd: defer config put in recv_work",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68372",
    "datePublished": "2025-12-24T10:33:02.679Z",
    "dateReserved": "2025-12-16T14:48:05.310Z",
    "dateUpdated": "2026-06-16T19:28:42.649Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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    "epss": {
      "cve": "CVE-2025-68372",
      "date": "2026-07-14",
      "epss": "0.00165",
      "percentile": "0.06061"
    },
    "microsoft_vex": {
      "current_release_date": "2026-02-18T02:32:55.000Z",
      "cve": "CVE-2025-68372",
      "id": "msrc_CVE-2025-68372",
      "initial_release_date": "2025-12-02T00:00:00.000Z",
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      "source": "Microsoft CSAF VEX",
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      "title": "nbd: defer config put in recv_work",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-68372.json",
      "version": "5"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68372\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-24T11:16:00.777\",\"lastModified\":\"2026-06-17T09:59:01.167\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnbd: defer config put in recv_work\\n\\nThere is one uaf issue in recv_work when running NBD_CLEAR_SOCK and\\nNBD_CMD_RECONFIGURE:\\n  nbd_genl_connect     // conf_ref=2 (connect and recv_work A)\\n  nbd_open\\t       // conf_ref=3\\n  recv_work A done     // conf_ref=2\\n  NBD_CLEAR_SOCK       // conf_ref=1\\n  nbd_genl_reconfigure // conf_ref=2 (trigger recv_work B)\\n  close nbd\\t       // conf_ref=1\\n  recv_work B\\n    config_put         // conf_ref=0\\n    atomic_dec(\u0026config-\u003erecv_threads); -\u003e UAF\\n\\nOr only running NBD_CLEAR_SOCK:\\n  nbd_genl_connect   // conf_ref=2\\n  nbd_open \\t     // conf_ref=3\\n  NBD_CLEAR_SOCK     // conf_ref=2\\n  close nbd\\n    nbd_release\\n      config_put     // conf_ref=1\\n  recv_work\\n    config_put \\t     // conf_ref=0\\n    atomic_dec(\u0026config-\u003erecv_threads); -\u003e UAF\\n\\nCommit 87aac3a80af5 (\\\"nbd: call nbd_config_put() before notifying the\\nwaiter\\\") moved nbd_config_put() to run before waking up the waiter in\\nrecv_work, in order to ensure that nbd_start_device_ioctl() would not\\nbe woken up while nbd-\u003etask_recv was still uncleared.\\n\\nHowever, in nbd_start_device_ioctl(), after being woken up it explicitly\\ncalls flush_workqueue() to make sure all current works are finished.\\nTherefore, there is no need to move the config put ahead of the wakeup.\\n\\nMove nbd_config_put() to the end of recv_work, so that the reference is\\nheld for the whole lifetime of the worker thread. This makes sure the\\nconfig cannot be freed while recv_work is still running, even if clear\\n+ reconfigure interleave.\\n\\nIn addition, we don\u0027t need to worry about recv_work dropping the last\\nnbd_put (which causes deadlock):\\n\\npath A (netlink with NBD_CFLAG_DESTROY_ON_DISCONNECT):\\n  connect  // nbd_refs=1 (trigger recv_work)\\n  open nbd // nbd_refs=2\\n  NBD_CLEAR_SOCK\\n  close nbd\\n    nbd_release\\n      nbd_disconnect_and_put\\n        flush_workqueue // recv_work done\\n      nbd_config_put\\n        nbd_put // nbd_refs=1\\n      nbd_put // nbd_refs=0\\n        queue_work\\n\\npath B (netlink without NBD_CFLAG_DESTROY_ON_DISCONNECT):\\n  connect  // nbd_refs=2 (trigger recv_work)\\n  open nbd // nbd_refs=3\\n  NBD_CLEAR_SOCK // conf_refs=2\\n  close nbd\\n    nbd_release\\n      nbd_config_put // conf_refs=1\\n      nbd_put // nbd_refs=2\\n  recv_work done // conf_refs=0, nbd_refs=1\\n  rmmod // nbd_refs=0\\n\\nDepends-on: e2daec488c57 (\\\"nbd: Fix hungtask when nbd_config_put\\\")\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/block/nbd.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"87aac3a80af5cbad93e63250e8a1e19095ba0d30\",\"lessThan\":\"198aa230a6f8c1f6af7ed26b29180749c3e79e4d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"87aac3a80af5cbad93e63250e8a1e19095ba0d30\",\"lessThan\":\"d3ba312675911ff9e3fefefd551751e153a9f0a9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"87aac3a80af5cbad93e63250e8a1e19095ba0d30\",\"lessThan\":\"3692884bd6187d89d41eef81e5a9724519fd01c1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"87aac3a80af5cbad93e63250e8a1e19095ba0d30\",\"lessThan\":\"1ba2ced2bbdf7e64a30c3e88c70ea8bc208d1509\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"87aac3a80af5cbad93e63250e8a1e19095ba0d30\",\"lessThan\":\"6b69593f72e1bfba6ca47ca8d9b619341fded7d6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"87aac3a80af5cbad93e63250e8a1e19095ba0d30\",\"lessThan\":\"443a1721806b6ff6303b5229e9811d68172d622f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"87aac3a80af5cbad93e63250e8a1e19095ba0d30\",\"lessThan\":\"742012f6bf29553fdc460bf646a58df3a7b43d01\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"87aac3a80af5cbad93e63250e8a1e19095ba0d30\",\"lessThan\":\"9517b82d8d422d426a988b213fdd45c6b417b86d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0a4e383fc3aa6540f804c4fd1184a96ae5de6ef8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2ef6f4bd60411934e3fc2715442c2afe70f84bf3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"742fd49cf811ca164489e339b862e3fb8e240a73\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"14df8724aeeef338172e2a2d6efadc989921ca0f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4.14.204\",\"lessThan\":\"4.15\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.19.155\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.75\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.9.5\",\"lessThan\":\"5.10\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/block/nbd.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.10\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.10\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.248\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.198\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.160\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.120\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.63\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.17.13\",\"lessThanOrEqual\":\"6.17.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.2\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-06-16T19:28:28.671225Z\",\"id\":\"CVE-2025-68372\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/198aa230a6f8c1f6af7ed26b29180749c3e79e4d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1ba2ced2bbdf7e64a30c3e88c70ea8bc208d1509\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3692884bd6187d89d41eef81e5a9724519fd01c1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/443a1721806b6ff6303b5229e9811d68172d622f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6b69593f72e1bfba6ca47ca8d9b619341fded7d6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/742012f6bf29553fdc460bf646a58df3a7b43d01\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9517b82d8d422d426a988b213fdd45c6b417b86d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d3ba312675911ff9e3fefefd551751e153a9f0a9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T01:53:04+00:00",
      "cve": "CVE-2025-68372",
      "id": "CVE-2025-68372",
      "initial_release_date": "2025-12-24T00:00:00+00:00",
      "product_status:known_affected": "246",
      "product_status:known_not_affected": "28",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: nbd: defer config put in recv_work",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68372.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-68372\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-16T19:28:28.671225Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-16T19:28:37.655Z\"}}], \"cna\": {\"title\": \"nbd: defer config put in recv_work\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"87aac3a80af5cbad93e63250e8a1e19095ba0d30\", \"lessThan\": \"198aa230a6f8c1f6af7ed26b29180749c3e79e4d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"87aac3a80af5cbad93e63250e8a1e19095ba0d30\", \"lessThan\": \"d3ba312675911ff9e3fefefd551751e153a9f0a9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"87aac3a80af5cbad93e63250e8a1e19095ba0d30\", \"lessThan\": \"3692884bd6187d89d41eef81e5a9724519fd01c1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"87aac3a80af5cbad93e63250e8a1e19095ba0d30\", \"lessThan\": \"1ba2ced2bbdf7e64a30c3e88c70ea8bc208d1509\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"87aac3a80af5cbad93e63250e8a1e19095ba0d30\", \"lessThan\": \"6b69593f72e1bfba6ca47ca8d9b619341fded7d6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"87aac3a80af5cbad93e63250e8a1e19095ba0d30\", \"lessThan\": \"443a1721806b6ff6303b5229e9811d68172d622f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"87aac3a80af5cbad93e63250e8a1e19095ba0d30\", \"lessThan\": \"742012f6bf29553fdc460bf646a58df3a7b43d01\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"87aac3a80af5cbad93e63250e8a1e19095ba0d30\", \"lessThan\": \"9517b82d8d422d426a988b213fdd45c6b417b86d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0a4e383fc3aa6540f804c4fd1184a96ae5de6ef8\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2ef6f4bd60411934e3fc2715442c2afe70f84bf3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"742fd49cf811ca164489e339b862e3fb8e240a73\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"14df8724aeeef338172e2a2d6efadc989921ca0f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"4.14.204\", \"lessThan\": \"4.15\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"4.19.155\", \"lessThan\": \"4.20\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.4.75\", \"lessThan\": \"5.5\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.9.5\", \"lessThan\": \"5.10\", \"versionType\": \"semver\"}], \"programFiles\": [\"drivers/block/nbd.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.10\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.10\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.248\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.198\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.160\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.120\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.63\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.17.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.17.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.18.*\"}, {\"status\": \"unaffected\", \"version\": \"6.19\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/block/nbd.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/198aa230a6f8c1f6af7ed26b29180749c3e79e4d\"}, {\"url\": \"https://git.kernel.org/stable/c/d3ba312675911ff9e3fefefd551751e153a9f0a9\"}, {\"url\": \"https://git.kernel.org/stable/c/3692884bd6187d89d41eef81e5a9724519fd01c1\"}, {\"url\": \"https://git.kernel.org/stable/c/1ba2ced2bbdf7e64a30c3e88c70ea8bc208d1509\"}, {\"url\": \"https://git.kernel.org/stable/c/6b69593f72e1bfba6ca47ca8d9b619341fded7d6\"}, {\"url\": \"https://git.kernel.org/stable/c/443a1721806b6ff6303b5229e9811d68172d622f\"}, {\"url\": \"https://git.kernel.org/stable/c/742012f6bf29553fdc460bf646a58df3a7b43d01\"}, {\"url\": \"https://git.kernel.org/stable/c/9517b82d8d422d426a988b213fdd45c6b417b86d\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnbd: defer config put in recv_work\\n\\nThere is one uaf issue in recv_work when running NBD_CLEAR_SOCK and\\nNBD_CMD_RECONFIGURE:\\n  nbd_genl_connect     // conf_ref=2 (connect and recv_work A)\\n  nbd_open\\t       // conf_ref=3\\n  recv_work A done     // conf_ref=2\\n  NBD_CLEAR_SOCK       // conf_ref=1\\n  nbd_genl_reconfigure // conf_ref=2 (trigger recv_work B)\\n  close nbd\\t       // conf_ref=1\\n  recv_work B\\n    config_put         // conf_ref=0\\n    atomic_dec(\u0026config-\u003erecv_threads); -\u003e UAF\\n\\nOr only running NBD_CLEAR_SOCK:\\n  nbd_genl_connect   // conf_ref=2\\n  nbd_open \\t     // conf_ref=3\\n  NBD_CLEAR_SOCK     // conf_ref=2\\n  close nbd\\n    nbd_release\\n      config_put     // conf_ref=1\\n  recv_work\\n    config_put \\t     // conf_ref=0\\n    atomic_dec(\u0026config-\u003erecv_threads); -\u003e UAF\\n\\nCommit 87aac3a80af5 (\\\"nbd: call nbd_config_put() before notifying the\\nwaiter\\\") moved nbd_config_put() to run before waking up the waiter in\\nrecv_work, in order to ensure that nbd_start_device_ioctl() would not\\nbe woken up while nbd-\u003etask_recv was still uncleared.\\n\\nHowever, in nbd_start_device_ioctl(), after being woken up it explicitly\\ncalls flush_workqueue() to make sure all current works are finished.\\nTherefore, there is no need to move the config put ahead of the wakeup.\\n\\nMove nbd_config_put() to the end of recv_work, so that the reference is\\nheld for the whole lifetime of the worker thread. This makes sure the\\nconfig cannot be freed while recv_work is still running, even if clear\\n+ reconfigure interleave.\\n\\nIn addition, we don\u0027t need to worry about recv_work dropping the last\\nnbd_put (which causes deadlock):\\n\\npath A (netlink with NBD_CFLAG_DESTROY_ON_DISCONNECT):\\n  connect  // nbd_refs=1 (trigger recv_work)\\n  open nbd // nbd_refs=2\\n  NBD_CLEAR_SOCK\\n  close nbd\\n    nbd_release\\n      nbd_disconnect_and_put\\n        flush_workqueue // recv_work done\\n      nbd_config_put\\n        nbd_put // nbd_refs=1\\n      nbd_put // nbd_refs=0\\n        queue_work\\n\\npath B (netlink without NBD_CFLAG_DESTROY_ON_DISCONNECT):\\n  connect  // nbd_refs=2 (trigger recv_work)\\n  open nbd // nbd_refs=3\\n  NBD_CLEAR_SOCK // conf_refs=2\\n  close nbd\\n    nbd_release\\n      nbd_config_put // conf_refs=1\\n      nbd_put // nbd_refs=2\\n  recv_work done // conf_refs=0, nbd_refs=1\\n  rmmod // nbd_refs=0\\n\\nDepends-on: e2daec488c57 (\\\"nbd: Fix hungtask when nbd_config_put\\\")\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.248\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.198\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.160\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.120\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.63\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.17.13\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.2\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.19\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.14.204\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.19.155\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.4.75\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.9.5\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-23T16:02:46.914Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-68372\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-16T19:28:42.649Z\", \"dateReserved\": \"2025-12-16T14:48:05.310Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-12-24T10:33:02.679Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.