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CVE-2026-98033: 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: Preserve inner map identity in callback frames Callback frame constructors initialize map-typed argument registers with __mark_reg_known_zero() and then restore map_ptr. This clears map_uid, which is the only field distinguishing inner maps that share an inner_map_meta template. When a timer callback invokes bpf_for_each_map_elem() on a second inner map, both the saved first map and the second map value can reach the nested callback as the same template with map_uid zero. bpf_timer_init() then accepts pairing the timer from the second map with the first map. The runtime records the first map in the timer without taking a reference. Freeing that map does not find the timer stored in the second map, so a later timer callback dereferences the freed map. Copy map_uid from the same caller register as map_ptr when constructing for-each, timer/workqueue, and task-work callback arguments. The existing identity check can then reject mismatched inner maps while allowing a callback value to be paired with its actual map.

    Засегнати продукти

    • Linux Linux: 69c087ba6225b574afb6e505b72cb75242a3d844 преди cf85e4f94d7feef8b3c4c90dbe2468595a48393b; 69c087ba6225b574afb6e505b72cb75242a3d844 преди 166221c52d3ca332f8699a854efca8e2704bb137; 69c087ba6225b574afb6e505b72cb75242a3d844 преди 08b534bafdd9de65b6374474a8fe719c90eb3b01; 69c087ba6225b574afb6e505b72cb75242a3d844 преди 66ff2eff093d2a0838f39c713eeb590bc0946c2a; 69c087ba6225b574afb6e505b72cb75242a3d844 преди b90c5d770dad910fb89e6c1b15052a8a1e8db752
    • Linux Linux: 5.13; преди 5.13; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 6.18.57 до 6.18.*; 7.2.7 до 7.2.*; от 7.3 нататък

    История

    • 25 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-98033: Linux | freedomonline.bg