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CVE-2026-80807: 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: nilfs2: reject invalid block index in GC ioctl Syzbot reported list corruption caused by a double list_add_tail() call on bh->b_assoc_buffers within nilfs_lookup_dirty_data_buffers(). Analysis revealed that the root cause was the insertion of a page/folio with a page index of ULONG_MAX into the page cache via the GC ioctl. filemap_get_folios_tag(), called by nilfs_lookup_dirty_data_buffers(), repeatedly detects a dirty folio with a page index of ULONG_MAX due to index wrap-around, leading to duplicate processing of dirty buffers. As a preparatory step, the GC ioctl loads the page/folio of the block to be moved during GC and inserts it into the page cache based on information in the nilfs_vdesc structure passed as an argument. Normally, this does not cause issues because the user-space GC library configures the nilfs_vdesc structure properly. However, since there is no range check on the parameters determining the page index, a request with artificially crafted parameters -- such as those generated by Syzbot -- can result in a page/folio being inserted with a page index of ULONG_MAX, triggering the above problem. This resolves the issue by checking the ranges of 'vd_offset' and 'vd_vblocknr' in the nilfs_vdesc structure that determine the page index, thereby preventing the invalid page/folio insertions.

    Засегнати продукти

    • Linux Linux: 7942b919f7321f95a777d396ff7894a7a83dc9b0 преди 898404cdf882d7b54f1132f75570984ca3214796; 7942b919f7321f95a777d396ff7894a7a83dc9b0 преди ba8a8b563a28d358c45c62a306d421434a058648; 7942b919f7321f95a777d396ff7894a7a83dc9b0 преди 3bd064ccc70b85f9a3d53aece29dc8473be5a226; 7942b919f7321f95a777d396ff7894a7a83dc9b0 преди a5e776e2937581d67ec5b9b4d27b0f70d7baa6b1; 7942b919f7321f95a777d396ff7894a7a83dc9b0 преди 68aa9ab6f8f2895713aa6ddf781463ed8ea5ba44; 7942b919f7321f95a777d396ff7894a7a83dc9b0 преди e447f7edb99bd00cec63d6f3049e2e5074946f71; 7942b919f7321f95a777d396ff7894a7a83dc9b0 преди ec6ddf271dfa4c7e3147bc2c8b2bad4315f316a1; 7942b919f7321f95a777d396ff7894a7a83dc9b0 преди fbcfb75c20d71a5b542ad4ac3b79d10b997c8152; 7942b919f7321f95a777d396ff7894a7a83dc9b0 преди a1735eae55448bc79c2da6593455791e886f6ed8
    • Linux Linux: 2.6.30; преди 2.6.30; 5.10.269 до 5.10.*; 5.15.220 до 5.15.*; 6.1.187 до 6.1.*; 6.6.156 до 6.6.*; 6.12.108 до 6.12.*; 6.18.47 до 6.18.*; 7.1.11 до 7.1.*; 7.2.1 до 7.2.*; 7.3 до *

    История

    • 4 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-80807: Linux | freedomonline.bg