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CVE-2026-89948: 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: batman-adv: bla: fix freeing of claims on meshif deletion When the mesh interface is getting deleted, then batadv_bla_del_backbone_claims() (via batadv_bla_purge_backbone_gw()) could make sure that all claims gets removed. But this function is only executed when bat_priv->bla.claim_hash is not NULL. And since batadv_bla_free() is always setting it to NULL before it is (indirectly) called, it was never actually executed. But the batadv_bla_purge_claims() -> batadv_handle_unclaim() is at the moment too fragile because the BLA code is not handling the rehashing in batadv_bla_update_orig_address(). The stored backbone address doesn't have to be the one actually used for the hash bucket selection during the initial adding of the backbone. The batadv_handle_unclaim() can therefore fail to find the respective backbone for the unclaim and then stop the deletion. But the actual backbone_gw object is not needed for the unclaim because all relevant information is always provided by the caller. And the check for the existence of the backbone_gw doesn't provide any additional security check for the deletion of a claim.

    Засегнати продукти

    • Linux Linux: 23721387c409087fd3b97e274f34d3ddc0970b74 преди 844a95a734f178d56c7acce14c5cce2cecff7e1a; 23721387c409087fd3b97e274f34d3ddc0970b74 преди baeb1a28fd8e2f68193650d3664a8cd1adfd85c6; 23721387c409087fd3b97e274f34d3ddc0970b74 преди aacffa780a37e06cd5a13d33740a6e96c3a67e6c; 23721387c409087fd3b97e274f34d3ddc0970b74 преди 76aedcde5a2489cc971d4d1e396e784a49565e96; 23721387c409087fd3b97e274f34d3ddc0970b74 преди f50edb69082a8ba990cc23d642089829f99afe6a; 23721387c409087fd3b97e274f34d3ddc0970b74 преди 871acdf97f64cee8398f72b88b89e8b4f4816dbe; 23721387c409087fd3b97e274f34d3ddc0970b74 преди 9a0c47023d3254048a1588534755d4476bcc3abc; 23721387c409087fd3b97e274f34d3ddc0970b74 преди 8d128c932bced74e3b1625ba3d7c78ef122a88a7
    • Linux Linux: 3.5; преди 3.5; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.110 до 6.12.*; 6.18.51 до 6.18.*; 7.2.5 до 7.2.*; от 7.3 нататък

    История

    • 16 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-89948: Linux | freedomonline.bg