CVE-2026-23354

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-23354
In the Linux kernel, the following vulnerability has been resolved: x86/fred: Correct speculative safety in fred_extint() array_index_nospec() is no use if the result gets spilled to the stack, as it makes the believed safe-under-speculation value subject to memory predictions. For all practical purposes, this means array_index_nospec() must be used in the expression that accesses the array. As the code currently stands, it's the wrong side of irqentry_enter(), and 'index' is put into %ebp across the function call. Remove the index variable and reposition array_index_nospec(), so it's calculated immediately before the array access.

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/3bc5887b0a2b06d2d9c22f1f4f8500490b3ae643 Patch
https://git.kernel.org/stable/c/92caa5274b99cb6729177232a029ce0dfa6c5f7b Patch
https://git.kernel.org/stable/c/aa280a08e7d8fae58557acc345b36b3dc329d595 Patch
https://git.kernel.org/stable/c/e58f1a9b0677de24dcfee0b21393446ec92ff120 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.9:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
History

24 Apr 2026, 19:15

Type Values Removed Values Added
First Time Linux
Linux linux Kernel
CPE cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.9:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
CWE CWE-129
References () https://git.kernel.org/stable/c/3bc5887b0a2b06d2d9c22f1f4f8500490b3ae643 - () https://git.kernel.org/stable/c/3bc5887b0a2b06d2d9c22f1f4f8500490b3ae643 - Patch
References () https://git.kernel.org/stable/c/92caa5274b99cb6729177232a029ce0dfa6c5f7b - () https://git.kernel.org/stable/c/92caa5274b99cb6729177232a029ce0dfa6c5f7b - Patch
References () https://git.kernel.org/stable/c/aa280a08e7d8fae58557acc345b36b3dc329d595 - () https://git.kernel.org/stable/c/aa280a08e7d8fae58557acc345b36b3dc329d595 - Patch
References () https://git.kernel.org/stable/c/e58f1a9b0677de24dcfee0b21393446ec92ff120 - () https://git.kernel.org/stable/c/e58f1a9b0677de24dcfee0b21393446ec92ff120 - Patch
Summary
  • (es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: x86/fred: Corregir la seguridad especulativa en fred_extint() array_index_nospec() no sirve de nada si el resultado se vuelca a la pila, ya que hace que el valor considerado seguro bajo especulación esté sujeto a predicciones de memoria. Para todos los propósitos prácticos, esto significa que array_index_nospec() debe usarse en la expresión que accede al array. Tal como está el código actualmente, está en el lado incorrecto de irqentry_enter(), y 'index' se coloca en %ebp a través de la llamada a la función. Eliminar la variable index y reposicionar array_index_nospec(), para que se calcule inmediatamente antes del acceso al array.
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8

25 Mar 2026, 11:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-03-25 11:16

Updated : 2026-04-24 19:15

NVD link : CVE-2026-23354

Mitre link : CVE-2026-23354

CVE.ORG link : CVE-2026-23354

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-129

Improper Validation of Array Index