CVE-2024-41023

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-41023
In the Linux kernel, the following vulnerability has been resolved: sched/deadline: Fix task_struct reference leak During the execution of the following stress test with linux-rt: stress-ng --cyclic 30 --timeout 30 --minimize --quiet kmemleak frequently reported a memory leak concerning the task_struct: unreferenced object 0xffff8881305b8000 (size 16136): comm "stress-ng", pid 614, jiffies 4294883961 (age 286.412s) object hex dump (first 32 bytes): 02 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 .@.............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ debug hex dump (first 16 bytes): 53 09 00 00 00 00 00 00 00 00 00 00 00 00 00 00 S............... backtrace: [<00000000046b6790>] dup_task_struct+0x30/0x540 [<00000000c5ca0f0b>] copy_process+0x3d9/0x50e0 [<00000000ced59777>] kernel_clone+0xb0/0x770 [<00000000a50befdc>] __do_sys_clone+0xb6/0xf0 [<000000001dbf2008>] do_syscall_64+0x5d/0xf0 [<00000000552900ff>] entry_SYSCALL_64_after_hwframe+0x6e/0x76 The issue occurs in start_dl_timer(), which increments the task_struct reference count and sets a timer. The timer callback, dl_task_timer, is supposed to decrement the reference count upon expiration. However, if enqueue_task_dl() is called before the timer expires and cancels it, the reference count is not decremented, leading to the leak. This patch fixes the reference leak by ensuring the task_struct reference count is properly decremented when the timer is canceled.

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/7a54d31face626f62de415ebe77b43f76c3ffaf4 Patch
https://git.kernel.org/stable/c/b58652db66c910c2245f5bee7deca41c12d707b9 Patch
https://git.kernel.org/stable/c/7a54d31face626f62de415ebe77b43f76c3ffaf4 Patch
https://git.kernel.org/stable/c/b58652db66c910c2245f5bee7deca41c12d707b9 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:6.10:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc7:*:*:*:*:*:*
History

17 Jun 2026, 07:47

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:*
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/7a54d31face626f62de415ebe77b43f76c3ffaf4 - () https://git.kernel.org/stable/c/7a54d31face626f62de415ebe77b43f76c3ffaf4 - Patch
References () https://git.kernel.org/stable/c/b58652db66c910c2245f5bee7deca41c12d707b9 - () https://git.kernel.org/stable/c/b58652db66c910c2245f5bee7deca41c12d707b9 - Patch
CWE CWE-401

21 Nov 2024, 09:32

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/7a54d31face626f62de415ebe77b43f76c3ffaf4 - () https://git.kernel.org/stable/c/7a54d31face626f62de415ebe77b43f76c3ffaf4 -
References () https://git.kernel.org/stable/c/b58652db66c910c2245f5bee7deca41c12d707b9 - () https://git.kernel.org/stable/c/b58652db66c910c2245f5bee7deca41c12d707b9 -
Summary
  • (es) En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: sched/deadline: Reparar fuga de referencia de task_struct Durante la ejecución de la siguiente prueba de estrés con linux-rt: estrés-ng --ciclic 30 --timeout 30 --minimize --quiet kmemleak informó con frecuencia una pérdida de memoria relacionada con task_struct: objeto sin referencia 0xffff8881305b8000 (tamaño 16136): comm "stress-ng", pid 614, jiffies 4294883961 (edad 286.412 s) volcado hexadecimal de objeto (primeros 32 bytes): 02 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 .@.............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ volcado hexadecimal de depuración (primeros 16 bytes): 53 09 00 00 00 00 00 00 00 00 00 00 00 00 00 00 S............... rastreo inverso : [&lt;00000000046b6790&gt;] dup_task_struct+0x30/0x540 [&lt;00000000c5ca0f0b&gt;] copy_process+0x3d9/0x50e0 [&lt;00000000ced59777&gt;] kernel_clone+0xb0/0x770 [&lt;00000000a50befd c&gt;] __do_sys_clone+0xb6/0xf0 [&lt;000000001dbf2008&gt;] do_syscall_64+0x5d/ 0xf0 [&lt;00000000552900ff&gt;] Entry_SYSCALL_64_after_hwframe+0x6e/0x76 El problema ocurre en start_dl_timer(), que incrementa el recuento de referencias de task_struct y establece un temporizador. Se supone que la devolución de llamada del temporizador, dl_task_timer, disminuye el recuento de referencia al expirar. Sin embargo, si se llama a enqueue_task_dl() antes de que expire el temporizador y lo cancela, el recuento de referencias no disminuye, lo que provoca la fuga. Este parche corrige la fuga de referencia al garantizar que el recuento de referencias de task_struct disminuya correctamente cuando se cancela el temporizador.

29 Jul 2024, 15:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-07-29 15:15

Updated : 2026-06-17 07:47

NVD link : CVE-2024-41023

Mitre link : CVE-2024-41023

CVE.ORG link : CVE-2024-41023

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-401

Missing Release of Memory after Effective Lifetime