Linux Kernel Vulnerability Affecting HNS3 Driver Functionality
CVE-2025-21802
What is CVE-2025-21802?
A vulnerability in the Linux kernel's HNS3 driver could lead to system instability during the unloading of drivers. When the HCLGE driver is unloaded, it attempts to disable Single Root I/O Virtualization (SR-IOV) for each AE device node in the list. If the HNS3 driver is concurrently unloaded, it can lead to an unexpected 'oops' error due to the removal of AE device nodes, potentially affecting system reliability. This issue is addressed by implementing a new mutex to safeguard the unloading process, ensuring that the unloading of the HCLGE driver does not conflict with ongoing operations associated with the HNS3 driver.
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Affected Version(s)
Linux d36b15e3e7b5937cb1f6ac590a85facc3a320642 < 622d92a67656e5c4d2d6ccac02d688ed995418c6
Linux 0dd8a25f355b4df2d41c08df1716340854c7d4c5 < 8c640dd3d900cc8988a39c007591f1deee776df4
Linux 0dd8a25f355b4df2d41c08df1716340854c7d4c5