{"id":"CVE-2026-97950","published":"2026-09-25T11:17:22.567","lastModified":"2026-09-25T11:17:22.567","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nconfigfs: pin the symlink target's dirent instead of chasing ->ci_dentry\n\ncreate_link() reads the target's configfs_dirent from\nitem->ci_dentry->d_fsdata, relying on the item reference taken by\nget_target().  That reference pins the item, not its dentry: the dentry is\npinned by DCACHE_PERSISTENT, which configfs_remove_dir() releases via\nsimple_rmdir() while the item is still alive.  A symlink racing with rmdir\nof its target can therefore find ->ci_dentry freed and its dirent\nreleased, triggering WARN_ON(!atomic_read(&sd->s_count)) in configfs_get().\n\nTake the dirent in get_target() as well, under ->d_lock and atomically\nwith the item reference, and pass it down to create_link().  A hashed\ndentry has not been killed yet, so its ->d_fsdata reference keeps the\ndirent alive there.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/4f54beb2e7f6d399396466682fba3539bcdcb414","tags":[]},{"url":"https://git.kernel.org/stable/c/a7c1290eef60711c10289c056ad32ed1f2b47b12","tags":[]},{"url":"https://git.kernel.org/stable/c/d47c5de1cd6bfbe1067fc310bf90e4e00205e839","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}