{"id":"CVE-2025-38720","state":"PUBLISHED","title":"net: hibmcge: fix rtnl deadlock issue","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hibmcge: fix rtnl deadlock issue\n\nCurrently, the hibmcge netdev acquires the rtnl_lock in\npci_error_handlers.reset_prepare() and releases it in\npci_error_handlers.reset_done().\n\nHowever, in the PCI framework:\npci_reset_bus - __pci_reset_slot - pci_slot_save_and_disable_locked -\n pci_dev_save_and_disable - err_handler->reset_prepare(dev);\n\nIn pci_slot_save_and_disable_locked():\n\tlist_for_each_entry(dev, &slot->bus->devices, bus_list) {\n\t\tif (!dev->slot || dev->slot!= slot)\n\t\t\tcontinue;\n\t\tpci_dev_save_and_disable(dev);\n\t\tif (dev->subordinate)\n\t\t\tpci_bus_save_and_disable_locked(dev->subordinate);\n\t}\n\nThis will iterate through all devices under the current bus and execute\nerr_handler->reset_prepare(), causing two devices of the hibmcge driver\nto sequentially request the rtnl_lock, leading to a deadlock.\n\nSince the driver now executes netif_device_detach()\nbefore the reset process, it will not concurrently with\nother netdev APIs, so there is no need to hold the rtnl_lock now.\n\nTherefore, this patch removes the rtnl_lock during the reset process and\nadjusts the position of HBG_NIC_STATE_RESETTING to ensure\nthat multiple resets are not executed concurrently.","publishedAt":"2025-09-04T15:33:14.057Z","updatedAt":"2026-05-11T21:33:40.872Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3f5a61f6d504f55ed1a36cce044d5123d508721f","status":"affected","lessThan":"d85a6346fd6f595c4914205762d0cdf35c004a5e","versionType":"git"},{"version":"3f5a61f6d504f55ed1a36cce044d5123d508721f","status":"affected","lessThan":"1343a8994ca7dba78f5dd818e89d68331c21c35d","versionType":"git"},{"version":"3f5a61f6d504f55ed1a36cce044d5123d508721f","status":"affected","lessThan":"c875503a9b9082928d7d3fc60b5400d16fbfae4e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/hisilicon/hibmcge/hbg_err.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.14","versionType":"semver"},{"version":"6.15.11","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16.2","status":"unaffected","lessThanOrEqual":"6.16.*","versionType":"semver"},{"version":"6.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/hisilicon/hibmcge/hbg_err.c"]}],"references":["https://git.kernel.org/stable/c/d85a6346fd6f595c4914205762d0cdf35c004a5e","https://git.kernel.org/stable/c/1343a8994ca7dba78f5dd818e89d68331c21c35d","https://git.kernel.org/stable/c/c875503a9b9082928d7d3fc60b5400d16fbfae4e"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/38xxx/CVE-2025-38720.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38720","state":"PUBLISHED","datePublished":"2025-09-04T15:33:14.057Z","dateUpdated":"2026-05-11T21:33:40.872Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T04:51:24.033Z"},"containers":{"cna":{"title":"net: hibmcge: fix rtnl deadlock issue","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hibmcge: fix rtnl deadlock issue\n\nCurrently, the hibmcge netdev acquires the rtnl_lock in\npci_error_handlers.reset_prepare() and releases it in\npci_error_handlers.reset_done().\n\nHowever, in the PCI framework:\npci_reset_bus - __pci_reset_slot - pci_slot_save_and_disable_locked -\n pci_dev_save_and_disable - err_handler->reset_prepare(dev);\n\nIn pci_slot_save_and_disable_locked():\n\tlist_for_each_entry(dev, &slot->bus->devices, bus_list) {\n\t\tif (!dev->slot || dev->slot!= slot)\n\t\t\tcontinue;\n\t\tpci_dev_save_and_disable(dev);\n\t\tif (dev->subordinate)\n\t\t\tpci_bus_save_and_disable_locked(dev->subordinate);\n\t}\n\nThis will iterate through all devices under the current bus and execute\nerr_handler->reset_prepare(), causing two devices of the hibmcge driver\nto sequentially request the rtnl_lock, leading to a deadlock.\n\nSince the driver now executes netif_device_detach()\nbefore the reset process, it will not concurrently with\nother netdev APIs, so there is no need to hold the rtnl_lock now.\n\nTherefore, this patch removes the rtnl_lock during the reset process and\nadjusts the position of HBG_NIC_STATE_RESETTING to ensure\nthat multiple resets are not executed concurrently."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3f5a61f6d504f55ed1a36cce044d5123d508721f","status":"affected","lessThan":"d85a6346fd6f595c4914205762d0cdf35c004a5e","versionType":"git"},{"version":"3f5a61f6d504f55ed1a36cce044d5123d508721f","status":"affected","lessThan":"1343a8994ca7dba78f5dd818e89d68331c21c35d","versionType":"git"},{"version":"3f5a61f6d504f55ed1a36cce044d5123d508721f","status":"affected","lessThan":"c875503a9b9082928d7d3fc60b5400d16fbfae4e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/hisilicon/hibmcge/hbg_err.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.14","versionType":"semver"},{"version":"6.15.11","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16.2","status":"unaffected","lessThanOrEqual":"6.16.*","versionType":"semver"},{"version":"6.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/hisilicon/hibmcge/hbg_err.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/d85a6346fd6f595c4914205762d0cdf35c004a5e"},{"url":"https://git.kernel.org/stable/c/1343a8994ca7dba78f5dd818e89d68331c21c35d"},{"url":"https://git.kernel.org/stable/c/c875503a9b9082928d7d3fc60b5400d16fbfae4e"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:33:40.872Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14","versionEndExcluding":"6.15.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14","versionEndExcluding":"6.16.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14","versionEndExcluding":"6.17"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}