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CVE-2026-80855: 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: fuse: fix invalidate lock leak on open O_TRUNC DAX failure fuse_open() takes filemap_invalidate_lock() for a DAX truncate (dax_truncate = true) and releases it before the out_inode_unlock label. But when fuse_dax_break_layouts() fails, the goto out_inode_unlock skips the unlock and leaks the rwsem, so any later fault or truncate on the file stalls on the stale lock. fuse_dax_break_layouts() can fail with -ERESTARTSYS when a signal interrupts the wait for busy DAX pages to drain: open("file", O_RDWR | O_TRUNC) └─ fuse_open() ├─ filemap_invalidate_lock() # dax_truncate └─ fuse_dax_break_layouts() └─ dax_break_layout() └─ wait_page_idle() # TASK_INTERRUPTIBLE └─ fuse_wait_dax_page() # unlock, schedule, re-lock └─ signal → -ERESTARTSYS goto out_inode_unlock # <- lock leaked Fix this by moving filemap_invalidate_unlock() below the label so that all error paths release the lock, and rename the label to out_unlock as it now covers more than just the inode lock.

    Засегнати продукти

    • Linux Linux: 81775ab858b4236c52c5da7e25cec6e49dd91b46 преди 69a294e561c10909688bcb25456535dcd1818e1a; d58366aab86854217b81679d1a9dcd54a2edfc2a преди 1b04d80a27d317064cce2307472f5bef9975bc50; 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b преди a61524da59a2f5ac9c8de23ff98b30da769ab144; 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b преди dcf30a56624c2a0cfab1bada5b1ca8cc0c02f010; 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b преди 7288c279ddbd654a06c82118c1a3f5570c1807f0; 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b преди 776e85fda752f9a15e0f82dec42ecacd12a9bd94; 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b преди 1d3e701cda2f41d48aa721b3ebefbe0fbf8d74da; 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b преди e981474d7bf1457da12404e169ea147d2c8ecea7; 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b преди a927f1867e61b78f39f9da0bbba3c98c2ca151fe; b57e150ac2eac791d5d187923b73dc2dafaf67fa; 1fdbbe246daf348adaa0739463384b16ceba1fc0; 5.10.179 преди 5.10.273; 5.15.109 преди 5.15.220; 5.18.18 преди 5.19; 5.19.2 преди 5.20
    • Linux Linux: 6.0; преди 6.0; 5.10.273 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.*; 6.18.49 до 6.18.*; 7.1.13 до 7.1.*; 7.2.3 до 7.2.*; от 7.3 нататък

    История

    • 4 септември 2026 Публикувано

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    Първоизточници

    CVE-2026-80855: Linux | freedomonline.bg