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CVE-2026-72431: 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: alloc_tag: fix use-after-free in /proc/allocinfo after module unload allocinfo_start() only reinitializes the codetag iterator at position 0. For subsequent reads (position > 0), it reuses cached iterator state from the previous batch. allocinfo_stop() drops mod_lock between read batches, which allows module unload to complete and free the module memory that the cached iterator still references: CPU0 (read) CPU1 (rmmod) ---- ---- allocinfo_start(pos=0) down_read(mod_lock) allocinfo_show() ... allocinfo_stop() up_read(mod_lock) codetag_unload_module() kfree(cmod) release_module_tags() ... free_mod_mem() allocinfo_start(pos=N) down_read(mod_lock) // reuses cached iter, skips re-init allocinfo_show() ct->filename <-- UAF After free_mod_mem() frees the module's .rodata, allocinfo_show() dereferences ct->filename, ct->function which point there. Save the iterator state in allocinfo_next() and resume from it in allocinfo_start() with codetag_next_ct(), which detects module removal via idr_find() returning NULL and skips to the next module.

    Засегнати продукти

    • Linux Linux: 9f44df50fee4d2f6cb374177244ccfa9f0a5cc95 преди 37e3e8a2c3bfdd503209f043f8bbfbdcf5a1d92f; 9f44df50fee4d2f6cb374177244ccfa9f0a5cc95 преди 008ceffd44040f809aead6d7bef7cb1210c4149a; 9f44df50fee4d2f6cb374177244ccfa9f0a5cc95 преди 2956268efc457cb05d29c1bf94de1e8e684d7bbc
    • Linux Linux: 6.17; преди 6.17; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; 7.2 до *

    История

    • 15 август 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-72431: Linux | freedomonline.bg