CVE-2024-56624

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-56624
In the Linux kernel, the following vulnerability has been resolved: iommufd: Fix out_fput in iommufd_fault_alloc() As fput() calls the file->f_op->release op, where fault obj and ictx are getting released, there is no need to release these two after fput() one more time, which would result in imbalanced refcounts: refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 48 PID: 2369 at lib/refcount.c:31 refcount_warn_saturate+0x60/0x230 Call trace: refcount_warn_saturate+0x60/0x230 (P) refcount_warn_saturate+0x60/0x230 (L) iommufd_fault_fops_release+0x9c/0xe0 [iommufd] ... VFS: Close: file count is 0 (f_op=iommufd_fops [iommufd]) WARNING: CPU: 48 PID: 2369 at fs/open.c:1507 filp_flush+0x3c/0xf0 Call trace: filp_flush+0x3c/0xf0 (P) filp_flush+0x3c/0xf0 (L) __arm64_sys_close+0x34/0x98 ... imbalanced put on file reference count WARNING: CPU: 48 PID: 2369 at fs/file.c:74 __file_ref_put+0x100/0x138 Call trace: __file_ref_put+0x100/0x138 (P) __file_ref_put+0x100/0x138 (L) __fput_sync+0x4c/0xd0 Drop those two lines to fix the warnings above.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/2b3f30c8edbf9a122ce01f13f0f41fbca5f1d41d Patch
https://git.kernel.org/stable/c/af7f4780514f850322b2959032ecaa96e4b26472 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*
History

26 Sep 2025, 16:05

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux linux Kernel
Linux
CWE CWE-401
References () https://git.kernel.org/stable/c/2b3f30c8edbf9a122ce01f13f0f41fbca5f1d41d - () https://git.kernel.org/stable/c/2b3f30c8edbf9a122ce01f13f0f41fbca5f1d41d - Patch
References () https://git.kernel.org/stable/c/af7f4780514f850322b2959032ecaa96e4b26472 - () https://git.kernel.org/stable/c/af7f4780514f850322b2959032ecaa96e4b26472 - Patch
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iommufd: Arreglar out_fput en iommufd_fault_alloc() Como fput() llama a la operación file->f_op->release, donde se liberan los objetos de falla y ictx, no hay necesidad de liberar estos dos después de fput() una vez más, lo que daría como resultado recuentos de referencias desequilibrados: refcount_t: el decremento llega a 0; pérdida de memoria. ADVERTENCIA: CPU: 48 PID: 2369 en lib/refcount.c:31 refcount_warn_saturate+0x60/0x230 Rastreo de llamadas: refcount_warn_saturate+0x60/0x230 (P) refcount_warn_saturate+0x60/0x230 (L) iommufd_fault_fops_release+0x9c/0xe0 [iommufd] ... VFS: Cerrar: el recuento de archivos es 0 (f_op=iommufd_fops [iommufd]) ADVERTENCIA: CPU: 48 PID: 2369 en fs/open.c:1507 filp_flush+0x3c/0xf0 Rastreo de llamadas: filp_flush+0x3c/0xf0 (P) filp_flush+0x3c/0xf0 (L) __arm64_sys_close+0x34/0x98 ... desequilibrado en el recuento de referencias de archivo ADVERTENCIA: CPU: 48 PID: 2369 en fs/file.c:74 __file_ref_put+0x100/0x138 Rastreo de llamadas: __file_ref_put+0x100/0x138 (P) __file_ref_put+0x100/0x138 (L) __fput_sync+0x4c/0xd0 Omita esas dos líneas para corregir las advertencias anteriores.

27 Dec 2024, 15:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-12-27 15:15

Updated : 2025-09-26 16:05

NVD link : CVE-2024-56624

Mitre link : CVE-2024-56624

CVE.ORG link : CVE-2024-56624

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-401

Missing Release of Memory after Effective Lifetime