CVE-2025-21802: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: net: hns3: fix oops when unload drivers paralleling When unload hclge driver, it tries to disable sriov first for each ae_dev node from hnae3_ae_dev_list. If user unloads hns3 driver at the time, because it removes all the ae_dev nodes, and it may cause oops. But we can't simply use hnae3_common_lock for this. Because in the process flow of pci_disable_sriov(), it will trigger the remove flow of VF, which will also take hnae3_common_lock. To fixes it, introduce a new mutex to protect the unload process.

Affected products

• Linux Linux Kernel: from 4.19.214, before 4.20 (fixed in 4.20); from 5.4.156, before 5.5 (fixed in 5.5); from 5.10.76, before 5.10.235 (fixed in 5.10.235); from 5.14.15, before 5.15 (fixed in 5.15); from 5.15.1, before 5.15.179 (fixed in 5.15.179); from 5.16, before 6.1.129 (fixed in 6.1.129); …

Published 2025-02-27. Last modified 2026-07-14.