cve-2024-36479
Vulnerability from cvelistv5
Published
2024-06-24 13:56
Modified
2024-11-05 09:27
Severity ?
Summary
fpga: bridge: add owner module and take its refcount
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website


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        "title": "CVE Program Container"
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        "metrics": [
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              "content": {
                "id": "CVE-2024-36479",
                "options": [
                  {
                    "Exploitation": "none"
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                  {
                    "Automatable": "no"
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                  {
                    "Technical Impact": "partial"
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                "timestamp": "2024-09-10T17:08:33.763603Z",
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    "cna": {
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          "product": "Linux",
          "programFiles": [
            "Documentation/driver-api/fpga/fpga-bridge.rst",
            "drivers/fpga/fpga-bridge.c",
            "include/linux/fpga/fpga-bridge.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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            "Documentation/driver-api/fpga/fpga-bridge.rst",
            "drivers/fpga/fpga-bridge.c",
            "include/linux/fpga/fpga-bridge.h"
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfpga: bridge: add owner module and take its refcount\n\nThe current implementation of the fpga bridge assumes that the low-level\nmodule registers a driver for the parent device and uses its owner pointer\nto take the module\u0027s refcount. This approach is problematic since it can\nlead to a null pointer dereference while attempting to get the bridge if\nthe parent device does not have a driver.\n\nTo address this problem, add a module owner pointer to the fpga_bridge\nstruct and use it to take the module\u0027s refcount. Modify the function for\nregistering a bridge to take an additional owner module parameter and\nrename it to avoid conflicts. Use the old function name for a helper macro\nthat automatically sets the module that registers the bridge as the owner.\nThis ensures compatibility with existing low-level control modules and\nreduces the chances of registering a bridge without setting the owner.\n\nAlso, update the documentation to keep it consistent with the new interface\nfor registering an fpga bridge.\n\nOther changes: opportunistically move put_device() from __fpga_bridge_get()\nto fpga_bridge_get() and of_fpga_bridge_get() to improve code clarity since\nthe bridge device is taken in these functions."
        }
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        "dateUpdated": "2024-11-05T09:27:18.402Z",
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        "shortName": "Linux"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-36479",
    "datePublished": "2024-06-24T13:56:51.367Z",
    "dateReserved": "2024-06-24T13:53:25.564Z",
    "dateUpdated": "2024-11-05T09:27:18.402Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-36479\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-06-24T14:15:12.157\",\"lastModified\":\"2024-06-24T19:26:47.037\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nfpga: bridge: add owner module and take its refcount\\n\\nThe current implementation of the fpga bridge assumes that the low-level\\nmodule registers a driver for the parent device and uses its owner pointer\\nto take the module\u0027s refcount. This approach is problematic since it can\\nlead to a null pointer dereference while attempting to get the bridge if\\nthe parent device does not have a driver.\\n\\nTo address this problem, add a module owner pointer to the fpga_bridge\\nstruct and use it to take the module\u0027s refcount. Modify the function for\\nregistering a bridge to take an additional owner module parameter and\\nrename it to avoid conflicts. Use the old function name for a helper macro\\nthat automatically sets the module that registers the bridge as the owner.\\nThis ensures compatibility with existing low-level control modules and\\nreduces the chances of registering a bridge without setting the owner.\\n\\nAlso, update the documentation to keep it consistent with the new interface\\nfor registering an fpga bridge.\\n\\nOther changes: opportunistically move put_device() from __fpga_bridge_get()\\nto fpga_bridge_get() and of_fpga_bridge_get() to improve code clarity since\\nthe bridge device is taken in these functions.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1da11f822042eb6ef4b6064dc048f157a7852529\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6896b6b2e2d9ec4e1b0acb4c1698a75a4b34d125\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d7c4081c54a1d4068de9440957303a76f9e5c95b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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