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CVE-2026-53352: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    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/signal.c:2619 get_signal+0xa8c/0x1330 kernel/signal.c:2884 arch_do_signal_or_restart+0xbc/0x840 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x8c/0x4d0 kernel/entry/common.c:98 do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f </TASK> Fix this race condition by clearing the JOBCTL_PENDING_MASK for the calling thread in zap_other_threads(), ensuring it does not retain any stale job control state after the thread group is destroyed. This aligns with other functions that tear down a thread group and abort group stops, such as zap_process() and complete_signal(), which correctly clear these flags for all threads including the current one.

    Засегнати продукти

    • Linux Linux: 39efa3ef3a376a4e53de2f82fc91182459d34200 преди 2b32b2fb241435145ea199efac024540759d2495; 39efa3ef3a376a4e53de2f82fc91182459d34200 преди 391ebe74456a0f1d60b3ba4a8a64d9f44c1728fe; 39efa3ef3a376a4e53de2f82fc91182459d34200 преди f8d720bc2e35d568c18be0644e92a468de428370; 39efa3ef3a376a4e53de2f82fc91182459d34200 преди f4aae11abb449dc536269705d0419ec69480faa9; 39efa3ef3a376a4e53de2f82fc91182459d34200 преди 76aebd9ef20078719dfd6282d3b06c27e900a65a; 39efa3ef3a376a4e53de2f82fc91182459d34200 преди 8c046f36222c6ce1e0daef2c45c891c72602f8a1; 39efa3ef3a376a4e53de2f82fc91182459d34200 преди dfcd0ba14769d94d76ac9d9814b85e7fcacd4e29; 39efa3ef3a376a4e53de2f82fc91182459d34200 преди 90918794a4e2c3b440f8fcf3847765a8b1d81b25
    • Linux Linux: 3.0; преди 3.0; 5.10.259 до 5.10.*; 5.15.210 до 5.15.*; 6.1.176 до 6.1.*; 6.6.143 до 6.6.*; 6.12.94 до 6.12.*; 6.18.36 до 6.18.*; 7.0.13 до 7.0.*; от 7.1 нататък
    • Siemens: още 4 продукта, добавени от Siemens

      SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, SIMATIC S7-1500 TM MFP - GNU/Linux subsystem, SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

    История

    • 1 юли 2026 Публикувано

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