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CVE-2026-80856: 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 setattr writeback failure fuse_do_setattr() takes filemap_invalidate_lock() for a DAX truncate (fault_blocked = true) and releases it at the out:/error: labels. But when a writeback flush is also needed, a write_inode_now() failure returns directly and leaks the lock, so any later fault or truncate on the file stalls on the stale rwsem. For example, truncate(2) on a setuid file reaches fuse_do_setattr() with both ATTR_SIZE and ATTR_MODE set: truncate(2) └─ do_truncate() ├─ dentry_needs_remove_privs() # S_ISUID └─ notify_change() # KILL_SUID -> ATTR_MODE └─ fuse_setattr() # no killpriv: │ # ia_valid |= ATTR_MODE └─ fuse_do_setattr() ├─ filemap_invalidate_lock() # IS_DAX && is_truncate └─ write_inode_now() # is_wb && ATTR_MODE └─ if (err) # e.g. daemon -> -EIO return err # <- lock leaked Fix this by adding an unlock label that releases the lock before returning the error, and use it for the fuse_dax_break_layouts() failure path as well.

    Засегнати продукти

    • Linux Linux: 6ae330cad6ef22ab8347ea9e0707dc56a7c7363f преди 92faaee1b108c6e4b07730d20896a6593a85f675; 6ae330cad6ef22ab8347ea9e0707dc56a7c7363f преди 8f14906ce9103ab8f2f1ebda45935a0d61b9d763; 6ae330cad6ef22ab8347ea9e0707dc56a7c7363f преди 03cfeeb135428fa83f0791d3f8f94d9298cae695; 6ae330cad6ef22ab8347ea9e0707dc56a7c7363f преди 92588d187ba4697a322e7aefe5d9e538a87d1cd2; 6ae330cad6ef22ab8347ea9e0707dc56a7c7363f преди ea9fea370b8de4ffd72e0ef89550415c15637787; 6ae330cad6ef22ab8347ea9e0707dc56a7c7363f преди 1758730d9eaa3c06cf415c3446d9f6eed9ed3eed; 6ae330cad6ef22ab8347ea9e0707dc56a7c7363f преди dd278d954c0e96a9cbd3cc491e07b8267d25f8d5; 6ae330cad6ef22ab8347ea9e0707dc56a7c7363f преди e8457ebfd77a46e8d1210e8888ea914ad064558e; 6ae330cad6ef22ab8347ea9e0707dc56a7c7363f преди 9afeca0d569c9fc89d758fe7a9339d1e8afb1546
    • Linux Linux: 5.10; преди 5.10; 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

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-80856: Linux | freedomonline.bg