CVE-2025-37884
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.
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | - | 6.1.136 |
| linux / linux_kernel | 6.2 | 6.6.89 |
| linux / linux_kernel | 6.7 | 6.12.26 |
| linux / linux_kernel | 6.13 | 6.14.5 |
| debian / debian_linux | 11.0 | 11.0.x |
- https://git.kernel.org/stable/c/255cbc9db7067a83713fd2f4b31034ddd266549a
- https://git.kernel.org/stable/c/45286680b385f2592db3003554872388dee66d68
- https://git.kernel.org/stable/c/4580f4e0ebdf8dc8d506ae926b88510395a0c1d1
- https://git.kernel.org/stable/c/b5a528a34e1f613565115a7a6016862ccbfcb9ac
- https://git.kernel.org/stable/c/c5c833f6375f8ecf9254dd27946c927c7d645421
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
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