- Vulnerability/
- CVE-2025-37884
CVE-2025-37884: bpf: Fix deadlock between rcu_tasks_trace and event_mutex.
First published: Fri May 09 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix deadlock between rcu_tasks_trace and event_mutex. Fix the following deadlock: CPU A _free_event() perf_kprobe_destroy() mutex_lock(&event_mutex) perf_trace_event_unreg() synchronize_rcu_tasks_trace() There are several paths where _free_event() grabs event_mutex and calls sync_rcu_tasks_trace. Above is one such case. CPU B bpf_prog_test_run_syscall() rcu_read_lock_trace() bpf_prog_run_pin_on_cpu() bpf_prog_load() bpf_tracing_func_proto() trace_set_clr_event() mutex_lock(&event_mutex) Delegate trace_set_clr_event() to workqueue to avoid such lock dependency.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel |
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Reference Links
- https://git.kernel.org/stable/c/255cbc9db7067a83713fd2f4b31034ddd266549a
- https://git.kernel.org/stable/c/b5a528a34e1f613565115a7a6016862ccbfcb9ac
- https://git.kernel.org/stable/c/c5c833f6375f8ecf9254dd27946c927c7d645421
- https://git.kernel.org/stable/c/45286680b385f2592db3003554872388dee66d68
- https://git.kernel.org/stable/c/4580f4e0ebdf8dc8d506ae926b88510395a0c1d1
Frequently Asked Questions
What is the severity of CVE-2025-37884?
CVE-2025-37884 has a medium severity rating due to the potential for deadlock issues in the Linux kernel.
How do I fix CVE-2025-37884?
To fix CVE-2025-37884, upgrade your Linux kernel to the latest patched version that resolves this vulnerability.
What systems are affected by CVE-2025-37884?
CVE-2025-37884 affects various versions of the Linux kernel that utilize bpf and may encounter deadlock conditions.
What kind of issues does CVE-2025-37884 cause?
CVE-2025-37884 can lead to deadlock situations, impacting system performance and stability.
Is there a workaround for CVE-2025-37884?
There are no official workarounds for CVE-2025-37884; updating the kernel is the recommended mitigation.
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