n the Linux kernel, the following vulnerability has been resolved: net: hibmcge: fix rtnl deadlock issue Currently, the hibmcge netdev acquires the rtnl_lock in pci_error_handlers.reset_prepare() and releases it in pci_error_handlers.reset_done(). However, in the PCI framework: pci_reset_bus - __pci_reset_slot - pci_slot_save_and_disable_locked - pci_dev_save_and_disable - err_handler->reset_prepare(dev); In pci_slot_save_and_disable_locked(): list_for_each_entry(dev, &slot->bus->devices, bus_list) { if (!dev->slot || dev->slot!= slot) continue; pci_dev_save_and_disable(dev); if (dev->subordinate) pci_bus_save_and_disable_locked(dev->subordinate); } This will iterate through all devices under the current bus and execute err_handler->reset_prepare(), causing two devices of the hibmcge driver to sequentially request the rtnl_lock, leading to a deadlock. Since the driver now executes netif_device_detach() before the reset process, it will not concurrently with other netdev APIs, so there is no need to hold the rtnl_lock now. Therefore, this patch removes the rtnl_lock during the reset process and adjusts the position of HBG_NIC_STATE_RESETTING to ensure that multiple resets are not executed concurrently.
Configuration 1 (hide)
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25 Nov 2025, 21:47
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
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| CWE | CWE-667 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| First Time |
Linux linux Kernel
Linux |
|
| References | () https://git.kernel.org/stable/c/1343a8994ca7dba78f5dd818e89d68331c21c35d - Patch | |
| References | () https://git.kernel.org/stable/c/c875503a9b9082928d7d3fc60b5400d16fbfae4e - Patch | |
| References | () https://git.kernel.org/stable/c/d85a6346fd6f595c4914205762d0cdf35c004a5e - Patch |
05 Sep 2025, 17:47
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Published : 2025-09-04 16:15
Updated : 2025-11-25 21:47
NVD link : CVE-2025-38720
Mitre link : CVE-2025-38720
CVE.ORG link : CVE-2025-38720
JSON object : View
Improper Locking