cve-2024-36479
Vulnerability from cvelistv5
Published
2024-06-24 13:56
Modified
2024-11-05 09:27
Severity ?
EPSS score ?
Summary
fpga: bridge: add owner module and take its refcount
References
{ "containers": { "adp": [ { "providerMetadata": { "dateUpdated": "2024-08-02T03:37:05.423Z", "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE" }, "references": [ { "tags": [ "x_transferred" ], "url": "https://git.kernel.org/stable/c/d7c4081c54a1d4068de9440957303a76f9e5c95b" }, { "tags": [ "x_transferred" ], "url": "https://git.kernel.org/stable/c/6896b6b2e2d9ec4e1b0acb4c1698a75a4b34d125" }, { "tags": [ "x_transferred" ], "url": "https://git.kernel.org/stable/c/1da11f822042eb6ef4b6064dc048f157a7852529" } ], "title": "CVE Program Container" }, { "metrics": [ { "other": { "content": { "id": "CVE-2024-36479", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "timestamp": "2024-09-10T17:08:33.763603Z", "version": "2.0.3" }, "type": "ssvc" } } ], "providerMetadata": { "dateUpdated": "2024-09-11T17:34:43.408Z", "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP" }, "title": "CISA ADP Vulnrichment" } ], "cna": { "affected": [ { "defaultStatus": "unaffected", "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", "versions": [ { "lessThan": "d7c4081c54a1", "status": "affected", "version": "21aeda950c5f", "versionType": "git" }, { "lessThan": "6896b6b2e2d9", "status": "affected", "version": "21aeda950c5f", "versionType": "git" }, { "lessThan": "1da11f822042", "status": "affected", "version": "21aeda950c5f", "versionType": "git" } ] }, { "defaultStatus": "affected", "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", "versions": [ { "status": "affected", "version": "4.10" }, { "lessThan": "4.10", "status": "unaffected", "version": "0", "versionType": "semver" }, { "lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.33", "versionType": "semver" }, { "lessThanOrEqual": "6.9.*", "status": "unaffected", "version": "6.9.4", "versionType": "semver" }, { "lessThanOrEqual": "*", "status": "unaffected", "version": "6.10", "versionType": "original_commit_for_fix" } ] } ], "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." } ], "providerMetadata": { "dateUpdated": "2024-11-05T09:27:18.402Z", "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux" }, "references": [ { "url": "https://git.kernel.org/stable/c/d7c4081c54a1d4068de9440957303a76f9e5c95b" }, { "url": "https://git.kernel.org/stable/c/6896b6b2e2d9ec4e1b0acb4c1698a75a4b34d125" }, { "url": "https://git.kernel.org/stable/c/1da11f822042eb6ef4b6064dc048f157a7852529" } ], "title": "fpga: bridge: add owner module and take its refcount", "x_generator": { "engine": "bippy-9e1c9544281a" } } }, "cveMetadata": { "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "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" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "meta": { "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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