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CVE-2026-53325: 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: agp/amd64: Fix broken error propagation in agp_amd64_probe() A NULL pointer dereference was observed in the AMD64 AGP driver when running in a virtualized environment (e.g. qemu/kvm) without a physical AMD northbridge. The crash occurs in amd64_fetch_size() when attempting to dereference the pointer returned by node_to_amd_nb(0). The root cause of this crash is broken error propagation in agp_amd64_probe(): When no AMD northbridges are found, cache_nbs() correctly returns -ENODEV. However, the probe function erroneously checks the return value against exactly -1, rather than < 0. As a result, the hardware absence error is masked, allowing the driver to improperly proceed with initialization. It eventually calls agp_add_bridge(), which invokes amd64_fetch_size(). Since the hardware does not exist, node_to_amd_nb(0) returns NULL, leading to a General Protection Fault (GPF) when accessing its ->misc member. Fix the issue by correcting the error check in agp_amd64_probe() to abort properly when cache_nbs() returns any negative error code. This prevents the driver from erroneously proceeding without hardware, thereby avoiding the subsequent NULL pointer dereference at its source.

    Засегнати продукти

    • Linux Linux: a32073bffc656ca4bde6002b6cf7c1a8e0e22712 преди ce800993af477fc24187349c6a20d3073140b759; a32073bffc656ca4bde6002b6cf7c1a8e0e22712 преди 1d7d45050e14083c1de1460c93f4063c1f0bca7b; a32073bffc656ca4bde6002b6cf7c1a8e0e22712 преди 3e844a63668d1c3d10a9d347d7ebf161b2f91c84; a32073bffc656ca4bde6002b6cf7c1a8e0e22712 преди eb045714bc6a2bbb0befb7a31b996a196e188869; a32073bffc656ca4bde6002b6cf7c1a8e0e22712 преди 564b3b3f6565313eb6fa5355ffd037d6fb27897f; a32073bffc656ca4bde6002b6cf7c1a8e0e22712 преди 53483a9f4ee9eeb18aa866ec16cce79e136987e1; a32073bffc656ca4bde6002b6cf7c1a8e0e22712 преди 0aa9b27c454c53074cde592eaceb442d30341585; a32073bffc656ca4bde6002b6cf7c1a8e0e22712 преди cefe535a60a2e00e09f4b2689b0c8ffc6912459a; a32073bffc656ca4bde6002b6cf7c1a8e0e22712 преди b08472db93b1ccff84a7adec5779d47f0e9d3a30
    • Linux Linux: 2.6.18; преди 2.6.18; 5.10.260 до 5.10.*; 5.15.211 до 5.15.*; 6.1.177 до 6.1.*; 6.6.144 до 6.6.*; 6.12.95 до 6.12.*; 6.18.37 до 6.18.*; 7.0.14 до 7.0.*; 7.1.2 до 7.1.*; от 7.2 нататък
    • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem: всички версии

    История

    • 29 юни 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-53325: Linux | freedomonline.bg