{"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":"2026-05-11T22:22:15.833Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:22:15.833Z"},"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":"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":"6.12.75","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":"6.12.75"},{"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/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"}}}}