CVE-2026-93108
UnknownSummary
In the Linux kernel, IPoIB reclamation completions can be signaled from inside an RCU callback. Teardown can wake before the callback returns and unload ib_ipoib while its code is still executing. Client registration failure can also remove already-added devices and queue callbacks; the fix waits after client and workqueue teardown.
Risk Assessment
Unloading a module while its code is executing leads to use-after-free, potentially causing kernel crashes or privilege escalation.
Recommendation
Update the Linux kernel to a version containing the fix. Avoid unloading the ib_ipoib module during active network traffic.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: RDMA/ipoib: Drain RCU callbacks during module teardown IPoIB reclamation completions can be signaled from inside an RCU callback. Teardown can wake before the callback returns and unload ib_ipoib while its code is still executing. Client registration failure can also remove already-added devices and queue callbacks. Wait after client and workqueue teardown.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS