CVE-2026-89782

In the Linux kernel, fs/ntfs3's ntfs_read_ea() does not verify that the EA record's ef->size is large enough to hold the record's name and value. A crafted NTFS image can set a small ef->size with a large elength, causing an out-of-bounds read past the allocated buffer and leaking kernel heap memory to userspace via getxattr().

In the Linux kernel, the fs/ntfs3 driver does not validate the dirty page table during log replay. A crafted DIR_PAGE_ENTRY with an invalid lcns_follow field lets the v0->v1 conversion and later replay passes run off the entry.

In the Linux kernel, ni_read_frame() in fs/ntfs3 trusts decompress_lznt()'s return value, which may be smaller than the frame size. Unwritten bytes remain in the vmapped pages and are returned to userspace, disclosing uninitialized kernel memory.

In the Linux kernel, the copy_lcns and redo shorten loops in fs/ntfs3 index page_lcns[] based on the log record's lcns_follow, which is not checked against the target entry. A crafted record can overflow page_lcns[] of an otherwise valid entry.

In the Linux kernel's NTFS3 filesystem, an infinite loop vulnerability was found when processing the range [valid : pos). If the valid value cannot be read correctly and remains the same, a process hang may occur, as reported by syzbot. A check was added to detect unchanged valid values and return -EINVAL.

In the Linux kernel, the NTFS3 filesystem has a vulnerability involving the use of uninitialized folios. Newly allocated folios are not marked as uptodate, and the ni_read_frame() function is skipped when the caller expects the frame to be completely overwritten, leaving part of the memory uninitialized.