CVE-2026-53352

취약점 유형

In the Linux kernel, the following vulnerability has been resolved: signal: clear JOBCTL_PENDING_MASK for caller in zap_other_threads() When a multi-threaded process receives a stop signal (e.g., SIGSTOP), do_signal_stop() sets JOBCTL_STOP_PENDING and JOBCTL_STOP_CONSUME on all threads and sets signal->group_stop_count to the number of threads. If one of the threads concurrently calls execve(), de_thread() invokes zap_other_threads() to kill all other threads. zap_other_threads() aborts the pending group stop by resetting signal->group_stop_count to 0 and clears the JOBCTL_PENDING_MASK for all other threads. However, it fails to clear the job control flags for the calling thread. When execve() completes, the calling thread returns to user mode and checks for pending signals. Seeing the stale JOBCTL_STOP_PENDING flag, it calls do_signal_stop(), which invokes task_participate_group_stop(). Since JOBCTL_STOP_CONSUME is still set, it attempts to decrement the already-zero signal->group_stop_count, triggering a warning: sig->group_stop_count == 0 WARNING: CPU: 1 PID: 6475 at kernel/signal.c:373 task_participate_group_stop+0x215/0x2d0 Call Trace: <TASK> do_signal_stop+0x3be/0x5c0 kernel/

영향받는 제품

• linux linux_kernel

참고 자료

• https://git.kernel.org/stable/c/2b32b2fb241435145ea199efac024540759d2495
• https://git.kernel.org/stable/c/391ebe74456a0f1d60b3ba4a8a64d9f44c1728fe
• https://git.kernel.org/stable/c/76aebd9ef20078719dfd6282d3b06c27e900a65a
• https://git.kernel.org/stable/c/8c046f36222c6ce1e0daef2c45c891c72602f8a1
• https://git.kernel.org/stable/c/90918794a4e2c3b440f8fcf3847765a8b1d81b25
• https://git.kernel.org/stable/c/dfcd0ba14769d94d76ac9d9814b85e7fcacd4e29