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CVE-2026-46173: Linux, грешка в паметта

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

CVE радар: още уязвимости от този вид

  • Експлоатация: няма данни за експлоатация
  • Атаката не може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: exit: prevent preemption of oopsing TASK_DEAD task When an already-exiting task oopses, make_task_dead() currently calls do_task_dead() with preemption enabled. That is forbidden: do_task_dead() calls __schedule(), which has a comment saying "WARNING: must be called with preemption disabled!". If an oopsing task is preempted in do_task_dead(), between becoming TASK_DEAD and entering the scheduler explicitly, bad things happen: finish_task_switch() assumes that once the scheduler has switched away from a TASK_DEAD task, the task can never run again and its stack is no longer needed; but that assumption apparently doesn't hold if the dead task was preempted (the SM_PREEMPT case). This means that the scheduler ends up repeatedly dropping references on the dead task's stack, which can lead to use-after-free or double-free of the entire task stack; in other words, two tasks can end up running on the same stack, resulting in various kinds of memory corruption. (This does not just affect "recursively oopsing" tasks; it is enough to oops once during task exit, for example in a file_operations::release handler)

Засегнати продукти

  • Linux Linux: 7f80a2fd7db9a55894fd841915236aca611291b5 преди 3d6fb8a7690c23e3213c4b008f64d89a44b98737; 7f80a2fd7db9a55894fd841915236aca611291b5 преди 640b4c00fb0e2920327435f6176cbefc3c546165; 7f80a2fd7db9a55894fd841915236aca611291b5 преди 7b2800ba5f5f77a8ee7f4cbadb19cf1264597a34; 7f80a2fd7db9a55894fd841915236aca611291b5 преди 6f49f94f3b11fe8bff1bf2a054143789e76aaf17; 7f80a2fd7db9a55894fd841915236aca611291b5 преди 9756b3db5db6c2f5eccb32dddbd88eb4c54f575e; 7f80a2fd7db9a55894fd841915236aca611291b5 преди c1fa0bb633e4a6b11e83ffc57fa5abe8ebb87891
  • Linux Linux: 5.17; преди 5.17; 6.1.175 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.*; 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

Вид слабост

История

  • 28 май 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-46173: Linux, грешка в паметта | freedomonline.bg