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CVE-2026-90247: 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: bpf: Fix mmap_lock leak in irq_work path stack_map_get_build_id_offset() introduced a per-CPU irq_work to defer mmap_read_unlock() from NMI context, and bpf_find_vma() later reused the same mmap_unlock_work. Both callers only check whether the work is busy before taking mmap_lock, so a nested caller can reuse the slot before the first caller queues it. Two read locks may then be acquired while only one deferred unlock runs, leaking a read lock and blocking exit_mmap(). Reserve the per-CPU slot before mmap_read_trylock(). Use the same wrapper in stackmap and bpf_find_vma() so both callers release the reservation on trylock failure. Keep rejecting the slot while the irq_work remains busy. Release it after the irq_work callback unlocks the mm.

    Засегнати продукти

    • Linux Linux: eac9153f2b584c702cea02c1f1a57d85aa9aea42 преди d6d091873e12d1de36d7228c4f452e6cace3a23e; eac9153f2b584c702cea02c1f1a57d85aa9aea42 преди b6c9daf6097f9b39162b8e736a6ac7caf5ef6fc8; eac9153f2b584c702cea02c1f1a57d85aa9aea42 преди 931f62311c058d79f29548f20943969bb441ce87; eac9153f2b584c702cea02c1f1a57d85aa9aea42 преди a052ad5edccf5319f50ed955de4368f8318a9f20; eac9153f2b584c702cea02c1f1a57d85aa9aea42 преди 051f2da26ce377f683b938a3382e0f16d02f3139; eac9153f2b584c702cea02c1f1a57d85aa9aea42 преди fa9dcacdcdf487f0ffef64bf67622f1caed509f1; a7f4da875c16f3b8bef0d9ec67528111045bfcd8; f1838da73cccb238b8be4ef464fce0168dc7ba84; 4.19.92 преди 4.20; 5.4.7 преди 5.5
    • Linux Linux: 5.5; преди 5.5; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 6.18.52 до 6.18.*; 7.2.6 до 7.2.*; от 7.3 нататък

    История

    • 17 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-90247: Linux | freedomonline.bg