{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-42253",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-42253"
  ],
  "published": "2024-08-08T08:46:46Z",
  "summary": "gpio: pca953x: fix pca953x_irq_bus_sync_unlock race",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: pca953x: fix pca953x_irq_bus_sync_unlock race\n\nEnsure that `i2c_lock' is held when setting interrupt latch and mask in\npca953x_irq_bus_sync_unlock() in order to avoid races.\n\nThe other (non-probe) call site pca953x_gpio_set_multiple() ensures the\nlock is held before calling pca953x_write_regs().\n\nThe problem occurred when a request raced against irq_bus_sync_unlock()\napproximately once per thousand reboots on an i.MX8MP based system.\n\n * Normal case\n\n   0-0022: write register AI|3a {03,02,00,00,01} Input latch P0\n   0-0022: write register AI|49 {fc,fd,ff,ff,fe} Interrupt mask P0\n   0-0022: write register AI|08 {ff,00,00,00,00} Output P3\n   0-0022: write register AI|12 {fc,00,00,00,00} Config P3\n\n * Race case\n\n   0-0022: write register AI|08 {ff,00,00,00,00} Output P3\n   0-0022: write register AI|08 {03,02,00,00,01} *** Wrong register ***\n   0-0022: write register AI|12 {fc,00,00,00,00} Config P3\n   0-0022: write register AI|49 {fc,fd,ff,ff,fe} Interrupt mask P0",
  "affected": [
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-42253"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/58a5c93bd1a6e949267400080f07e57ffe05ec34"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e2ecdddca80dd845df42376e4b0197fe97018ba2"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/de7cffa53149c7b48bd1bb29b02390c9f05b7f41"
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z"
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}