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CVE-2026-99235: Linux

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.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: tracing: Save the event file instead of the compatible histogram create_field_var_hist() creates a histogram on the matched event to supply a field variable, and records it on the target so it can be torn down later: hist_data = find_compatible_hist(target_hist_data, file); ... /* Save the compatible histogram information */ var_hist->hist_data = hist_data; hist_data is not the histogram it creates. It is one that was already there, whose keys the new one copies. The saved pointer has a single user, unregister_field_var_hists(), which runs when the target is removed: file = hist_data->field_var_hists[i]->hist_data->event_file; find_compatible_hist() matches on keys alone, so it can pick one with no variables of its own. check_var_refs() then returns false and the user can remove it while the target still points at it: BUG: KASAN: slab-use-after-free in event_hist_trigger_free+0x2b2/0x320 Read of size 8 at addr ffff8880093b90e0 by task init/1 Freed by task 1: kfree+0x154/0x420 event_hist_trigger_free+0x1d5/0x320 event_hist_trigger_parse+0x35f3/0x69e0 trigger_process_regex+0x1a6/0x250 Save the event file instead. It is all the dereference ever wanted, and it does not go away when the user removes a trigger.

    Засегнати продукти

    • Linux Linux: 02205a6752f223779a1b0e9e8ffacbea6e717851 преди a6165126b1a1b26342b55be6eb6ee23af8756aba; 02205a6752f223779a1b0e9e8ffacbea6e717851 преди 173914501b97236d7ea7dc2af7f30feddd4e1436; 02205a6752f223779a1b0e9e8ffacbea6e717851 преди ac815a379644b2ad5008a009a3516ada31b5dd82; 02205a6752f223779a1b0e9e8ffacbea6e717851 преди 8b307d64a60548e4a74cb746f74d7ed4bd49965e; 02205a6752f223779a1b0e9e8ffacbea6e717851 преди 7a111ba0d1b74c99bc8f096565dc71945f694254; 02205a6752f223779a1b0e9e8ffacbea6e717851 преди 3609ada3c12cecfb0ae5ee82ef4f86c5f18a2dea; 02205a6752f223779a1b0e9e8ffacbea6e717851 преди 9631dbccd3c649b567a5aafffea6b00634183997; 02205a6752f223779a1b0e9e8ffacbea6e717851 преди 7cafc82e6153f05a221be678cd649d02e06ba909; 02205a6752f223779a1b0e9e8ffacbea6e717851 преди d5c42664fc094899af9aae5300b27fe8fdb658ef
    • Linux Linux: 4.17; преди 4.17; 5.10.273 до 5.10.*; 5.15.224 до 5.15.*; 6.1.191 до 6.1.*; 6.6.161 до 6.6.*; 6.12.115 до 6.12.*; 6.18.60 до 6.18.*; 7.2.14 до 7.2.*; 7.3.1 до 7.3.*; от 7.4-rc1 нататък

    История

    • 2 ноември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-99235: Linux | freedomonline.bg