fs: ntfs3: fix infinite loop triggered by zero-sized ATTR_LIST

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Summary

CVECVE-2025-71267
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-18 11:16:15 UTC
Updated2026-05-21 18:28:40 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-835

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected be71b5cba2e6485e8959da7a9f9a44461a1bb074 9267d99fade76d44d4a133599524031fe684156e git Not specified
CNA Linux Linux affected be71b5cba2e6485e8959da7a9f9a44461a1bb074 976e6a7c51fabf150478decbe8ef5d9a26039b7c git Not specified
CNA Linux Linux affected be71b5cba2e6485e8959da7a9f9a44461a1bb074 8d8c70b57dbeda3eb165c0940b97e85373ca9354 git Not specified
CNA Linux Linux affected be71b5cba2e6485e8959da7a9f9a44461a1bb074 7ef219656febf5ae06ae56b1fce47ebd05f92b68 git Not specified
CNA Linux Linux affected be71b5cba2e6485e8959da7a9f9a44461a1bb074 9779a6eaaabdf47aa57910d352b398ad742e6a5f git Not specified
CNA Linux Linux affected be71b5cba2e6485e8959da7a9f9a44461a1bb074 fd508939dbca5eceefb2d0c2564beb15469572f2 git Not specified
CNA Linux Linux affected be71b5cba2e6485e8959da7a9f9a44461a1bb074 06909b2549d631a47fcda249d34be26f7ca1711d git Not specified
CNA Linux Linux affected 5.15 Not specified
CNA Linux Linux unaffected 5.15 semver Not specified
CNA Linux Linux unaffected 5.15.202 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.165 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.128 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.75 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.16 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.6 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/06909b2549d631a47fcda249d34be26f7ca1711d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/9267d99fade76d44d4a133599524031fe684156e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/fd508939dbca5eceefb2d0c2564beb15469572f2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/9779a6eaaabdf47aa57910d352b398ad742e6a5f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8d8c70b57dbeda3eb165c0940b97e85373ca9354 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/7ef219656febf5ae06ae56b1fce47ebd05f92b68 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/976e6a7c51fabf150478decbe8ef5d9a26039b7c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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