{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "a720416d94634068951773cb9e9d6f1b73769e5b"
            },
            {
              "fixed": "fabfed1afe273717ea33b8aee46b767360edbb80"
            },
            {
              "fixed": "f8431b8672231d378b03176fe74c95adfd3522cf"
            },
            {
              "fixed": "e341e18215030af2136836b78508e0d798916df7"
            },
            {
              "fixed": "41ccfac7d302968a4f32b5f7b012d066c5f5cdf8"
            },
            {
              "fixed": "40534d19ed2afb880ecf202dab26a8e7a5808d16"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.142"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.75"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.16"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43319.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: spidev: fix lock inversion between spi_lock and buf_lock\n\nThe spidev driver previously used two mutexes, spi_lock and buf_lock,\nbut acquired them in different orders depending on the code path:\n\n  write()/read(): buf_lock -\u003e spi_lock\n  ioctl():       spi_lock -\u003e buf_lock\n\nThis AB-BA locking pattern triggers lockdep warnings and can\ncause real deadlocks:\n\n  WARNING: possible circular locking dependency detected\n  spidev_ioctl() -\u003e mutex_lock(\u0026spidev-\u003ebuf_lock)\n  spidev_sync_write() -\u003e mutex_lock(\u0026spidev-\u003espi_lock)\n  *** DEADLOCK ***\n\nThe issue is reproducible with a simple userspace program that\nperforms write() and SPI_IOC_WR_MAX_SPEED_HZ ioctl() calls from\nseparate threads on the same spidev file descriptor.\n\nFix this by simplifying the locking model and removing the lock\ninversion entirely. spidev_sync() no longer performs any locking,\nand all callers serialize access using spi_lock.\n\nbuf_lock is removed since its functionality is fully covered by\nspi_lock, eliminating the possibility of lock ordering issues.\n\nThis removes the lock inversion and prevents deadlocks without\nchanging userspace ABI or behaviour.",
  "id": "CVE-2026-43319",
  "modified": "2026-07-08T05:39:01.031703970Z",
  "published": "2026-05-08T13:26:14.231Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/40534d19ed2afb880ecf202dab26a8e7a5808d16"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/41ccfac7d302968a4f32b5f7b012d066c5f5cdf8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e341e18215030af2136836b78508e0d798916df7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f8431b8672231d378b03176fe74c95adfd3522cf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fabfed1afe273717ea33b8aee46b767360edbb80"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43319.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43319"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "spi: spidev: fix lock inversion between spi_lock and buf_lock"
}