CVE-2025-71267

Description

In the Linux kernel, the following vulnerability has been resolved: fs: ntfs3: fix infinite loop triggered by zero-sized ATTR_LIST We found an infinite loop bug in the ntfs3 file system that can lead to a Denial-of-Service (DoS) condition. A malformed NTFS image can cause an infinite loop when an ATTR_LIST attribute indicates a zero data size while the driver allocates memory for it. When ntfs_load_attr_list() processes a resident ATTR_LIST with data_size set to zero, it still allocates memory because of al_aligned(0). This creates an inconsistent state where ni->attr_list.size is zero, but ni->attr_list.le is non-null. This causes ni_enum_attr_ex to incorrectly assume that no attribute list exists and enumerates only the primary MFT record. When it finds ATTR_LIST, the code reloads it and restarts the enumeration, repeating indefinitely. The mount operation never completes, hanging the kernel thread. This patch adds validation to ensure that data_size is non-zero before memory allocation. When a zero-sized ATTR_LIST is detected, the function returns -EINVAL, preventing a DoS vulnerability.

PUBLISHED Reserved 2026-03-17 | Published 2026-03-18 | Updated 2026-04-13 | Assigner Linux

Product status

References

git.kernel.org/...c/9267d99fade76d44d4a133599524031fe684156e

git.kernel.org/...c/976e6a7c51fabf150478decbe8ef5d9a26039b7c

git.kernel.org/...c/8d8c70b57dbeda3eb165c0940b97e85373ca9354

git.kernel.org/...c/7ef219656febf5ae06ae56b1fce47ebd05f92b68

git.kernel.org/...c/9779a6eaaabdf47aa57910d352b398ad742e6a5f

git.kernel.org/...c/fd508939dbca5eceefb2d0c2564beb15469572f2

git.kernel.org/...c/06909b2549d631a47fcda249d34be26f7ca1711d

cve.org (CVE-2025-71267)

nvd.nist.gov (CVE-2025-71267)

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