// For flags

CVE-2025-71267

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

Severity Score

"-"
*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: fs: ntfs3: corrige bucle infinito provocado por ATTR_LIST de tamaño cero Se encontró un error de bucle infinito en el sistema de archivos ntfs3 que puede llevar a una condición de Denegación de Servicio (DoS). Una imagen NTFS malformada puede causar un bucle infinito cuando un atributo ATTR_LIST indica un tamaño de datos cero mientras el controlador asigna memoria para ello. Cuando ntfs_load_attr_list() procesa un ATTR_LIST residente con data_size establecido en cero, todavía asigna memoria debido a al_aligned(0). Esto crea un estado inconsistente donde ni->attr_list.size es cero, pero ni->attr_list.le no es nulo. Esto hace que ni_enum_attr_ex asuma incorrectamente que no existe ninguna lista de atributos y enumere solo el registro MFT primario. Cuando encuentra ATTR_LIST, el código lo recarga y reinicia la enumeración, repitiéndose indefinidamente. La operación de montaje nunca se completa, colgando el hilo del kernel. Este parche añade validación para asegurar que data_size no sea cero antes de la asignación de memoria. Cuando se detecta un ATTR_LIST de tamaño cero, la función devuelve -EINVAL, previniendo una vulnerabilidad de DoS.

*Credits: N/A
CVSS Scores
Attack Vector
-
Attack Complexity
-
Privileges Required
-
User Interaction
-
Scope
-
Confidentiality
-
Integrity
-
Availability
-
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2026-03-17 CVE Reserved
  • 2026-03-18 CVE Published
  • 2026-04-19 EPSS Updated
  • 2026-05-11 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 5.15 < 5.15.202
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15 < 5.15.202"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 5.15 < 6.1.165
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15 < 6.1.165"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 5.15 < 6.6.128
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15 < 6.6.128"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 5.15 < 6.12.75
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15 < 6.12.75"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 5.15 < 6.18.16
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15 < 6.18.16"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 5.15 < 6.19.6
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15 < 6.19.6"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 5.15 < 7.0
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15 < 7.0"
en
Affected