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CVE-2026-99159: Linux

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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: ring-buffer: Fix the sub-buffer array base in rb_meta_subbuf_idx() On a persistent ring buffer, rb_meta_subbuf_idx() can return an index one sub-buffer too high. rb_setup_ids_meta_page() then fills subbuf_ids[] shifted by one and leaves subbuf_ids[0] NULL, which __rb_map_vma() dereferences when userspace maps trace_pipe_raw. rb_update_meta_reader() writes two such indices into meta->buffers[], which rb_cpu_meta_valid() would reject on the next boot, discarding the previous boot's trace. A CPU's sub-buffer array starts after its meta header and the nr_subbufs integers that follow, aligned up to a sub-buffer. rb_meta_subbuf_idx() inverts that calculation but skips only the integers, not the header, so its base is one sub-buffer low whenever the omitted header size crosses the alignment boundary. Invert the calculation with rb_subbufs_from_meta() rather than repeating it. rb_range_buffer() maps an index back to an address through the same helper, so the two directions can no longer disagree.

    Засегнати продукти

    • Linux Linux: b14d032973d4e6c36e025e96ea3437de53d072d9 преди 0c0cf2240bb5ca5704ea932ba66ee54f43173915; b14d032973d4e6c36e025e96ea3437de53d072d9 преди 2f1248b728b56d583ea454fedf239550c49f7b18; b14d032973d4e6c36e025e96ea3437de53d072d9 преди 7469b3585ef5f65840d467d2caa811a9098c84b9; b14d032973d4e6c36e025e96ea3437de53d072d9 преди 25132363c723afc39aace8b098f547ab4a0ea759
    • Linux Linux: 6.12; преди 6.12; 6.12.115 до 6.12.*; 6.18.59 до 6.18.*; 7.2.13 до 7.2.*; от 7.3 нататък

    История

    • 28 октомври 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-99159: Linux | freedomonline.bg