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CVE-2026-46196: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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Време до експлоатация

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: tracepoint: balance regfunc() on func_add() failure in tracepoint_add_func() When a tracepoint goes through the 0 -> 1 transition, tracepoint_add_func() invokes the subsystem's ext->regfunc() before attempting to install the new probe via func_add(). If func_add() then fails (for example, when allocate_probes() cannot allocate a new probe array under memory pressure and returns -ENOMEM), the function returns the error without calling the matching ext->unregfunc(), leaving the side effects of regfunc() behind with no installed probe to justify them. For syscall tracepoints this is particularly unpleasant: syscall_regfunc() bumps sys_tracepoint_refcount and sets SYSCALL_TRACEPOINT on every task. After a leaked failure, the refcount is stuck at a non-zero value with no consumer, and every task continues paying the syscall trace entry/exit overhead until reboot. Other subsystems providing regfunc()/unregfunc() pairs exhibit similarly scoped persistent state. Mirror the existing 1 -> 0 cleanup and call ext->unregfunc() in the func_add() error path, gated on the same condition used there so the unwind is symmetric with the registration.

    Засегнати продукти

    • Linux Linux: 8cf868affdc459beee1a941df0cfaba1673740e3 преди 5787052e5f69beb649f3d6a80a8aa37d9e683e4e; 8cf868affdc459beee1a941df0cfaba1673740e3 преди 4f1756d043e56ea2e9a6c858fb290a0cf6fc2251; 8cf868affdc459beee1a941df0cfaba1673740e3 преди 36ff362235307af95152d510b53c2d9b8773a342; 8cf868affdc459beee1a941df0cfaba1673740e3 преди 247ed8a969f981bfba3112fd4bb441eaa6cef59c; 8cf868affdc459beee1a941df0cfaba1673740e3 преди 7bcadb3c2bc1cf60690e931aadd35fb7bd646a49; 8cf868affdc459beee1a941df0cfaba1673740e3 преди 2c5b8eeea006eb694c81631cd5713d494b80be90; 8cf868affdc459beee1a941df0cfaba1673740e3 преди 342829e042ac00f3d68d442ea92873fb6683f494; 8cf868affdc459beee1a941df0cfaba1673740e3 преди fad217e16fded7f3c09f8637b0f6a224d58b5f2e
    • Linux Linux: 4.10; преди 4.10; 5.10.259 до 5.10.*; 5.15.210 до 5.15.*; 6.1.176 до 6.1.*; 6.6.140 до 6.6.*; 6.12.88 до 6.12.*; 6.18.30 до 6.18.*; 7.0.7 до 7.0.*; 7.1 до *
    • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem: преди *

    История

    • 28 май 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-46196: Linux | freedomonline.bg