{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ed9eccbe8970f6eedc1b978c157caf1251a896d4"
            },
            {
              "fixed": "3181c34b415c5464be9d34bff3e43ef63b747039"
            },
            {
              "fixed": "2b1f49e4fdff3ef0f8e9158bbb5b149e06287560"
            },
            {
              "fixed": "4d5ffe524903a30e2e0da7d16841a56bec2de55c"
            },
            {
              "fixed": "c01bcc67a9a692d65508ebd480405b5e77d562b7"
            },
            {
              "fixed": "430291d8f3884f57ae0057049b0ca291453e29e1"
            },
            {
              "fixed": "b89c026227712c367950bbae055a5b31073d3b30"
            },
            {
              "fixed": "83134a7a176ce5b4b19b6edecf4360e8d98d1a5a"
            },
            {
              "fixed": "4b9a9a6d71e3e252032f959fb3895a33acb5865c"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.29"
            },
            {
              "fixed": "5.10.253"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.203"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.168"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.134"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.81"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.22"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43340.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: Reinit dev-\u003espinlock between attachments to low-level drivers\n\n`struct comedi_device` is the main controlling structure for a COMEDI\ndevice created by the COMEDI subsystem.  It contains a member `spinlock`\ncontaining a spin-lock that is initialized by the COMEDI subsystem, but\nis reserved for use by a low-level driver attached to the COMEDI device\n(at least since commit 25436dc9d84f (\"Staging: comedi: remove RT\ncode\")).\n\nSome COMEDI devices (those created on initialization of the COMEDI\nsubsystem when the \"comedi.comedi_num_legacy_minors\" parameter is\nnon-zero) can be attached to different low-level drivers over their\nlifetime using the `COMEDI_DEVCONFIG` ioctl command.  This can result in\ninconsistent lock states being reported when there is a mismatch in the\nspin-lock locking levels used by each low-level driver to which the\nCOMEDI device has been attached.  Fix it by reinitializing\n`dev-\u003espinlock` before calling the low-level driver's `attach` function\npointer if `CONFIG_LOCKDEP` is enabled.",
  "id": "CVE-2026-43340",
  "modified": "2026-07-15T01:49:20.907200793Z",
  "published": "2026-05-08T13:37:18.580Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2b1f49e4fdff3ef0f8e9158bbb5b149e06287560"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3181c34b415c5464be9d34bff3e43ef63b747039"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/430291d8f3884f57ae0057049b0ca291453e29e1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b9a9a6d71e3e252032f959fb3895a33acb5865c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4d5ffe524903a30e2e0da7d16841a56bec2de55c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/83134a7a176ce5b4b19b6edecf4360e8d98d1a5a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b89c026227712c367950bbae055a5b31073d3b30"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c01bcc67a9a692d65508ebd480405b5e77d562b7"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43340.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43340"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "comedi: Reinit dev-\u003espinlock between attachments to low-level drivers"
}