{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43319",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:56.001Z",
        "datePublished": "2026-05-08T13:26:14.231Z",
        "dateUpdated": "2026-06-01T16:15:35.875Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-01T16:15:35.875Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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 -> spi_lock\n  ioctl():       spi_lock -> 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() -> mutex_lock(&spidev->buf_lock)\n  spidev_sync_write() -> mutex_lock(&spidev->spi_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."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/spi/spidev.c"
                    ],
                    "versions": [
                        {
                            "version": "a720416d94634068951773cb9e9d6f1b73769e5b",
                            "lessThan": "fabfed1afe273717ea33b8aee46b767360edbb80",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a720416d94634068951773cb9e9d6f1b73769e5b",
                            "lessThan": "f8431b8672231d378b03176fe74c95adfd3522cf",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a720416d94634068951773cb9e9d6f1b73769e5b",
                            "lessThan": "e341e18215030af2136836b78508e0d798916df7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a720416d94634068951773cb9e9d6f1b73769e5b",
                            "lessThan": "41ccfac7d302968a4f32b5f7b012d066c5f5cdf8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a720416d94634068951773cb9e9d6f1b73769e5b",
                            "lessThan": "40534d19ed2afb880ecf202dab26a8e7a5808d16",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/spi/spidev.c"
                    ],
                    "versions": [
                        {
                            "version": "6.2",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.2",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.142",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.75",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.16",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.6",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2",
                                    "versionEndExcluding": "6.6.142"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2",
                                    "versionEndExcluding": "6.12.75"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2",
                                    "versionEndExcluding": "6.18.16"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2",
                                    "versionEndExcluding": "6.19.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/fabfed1afe273717ea33b8aee46b767360edbb80"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f8431b8672231d378b03176fe74c95adfd3522cf"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e341e18215030af2136836b78508e0d798916df7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/41ccfac7d302968a4f32b5f7b012d066c5f5cdf8"
                },
                {
                    "url": "https://git.kernel.org/stable/c/40534d19ed2afb880ecf202dab26a8e7a5808d16"
                }
            ],
            "title": "spi: spidev: fix lock inversion between spi_lock and buf_lock",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}