CVE-2024-39296

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-39296
In the Linux kernel, the following vulnerability has been resolved: bonding: fix oops during rmmod "rmmod bonding" causes an oops ever since commit cc317ea3d927 ("bonding: remove redundant NULL check in debugfs function"). Here are the relevant functions being called: bonding_exit() bond_destroy_debugfs() debugfs_remove_recursive(bonding_debug_root); bonding_debug_root = NULL; <--------- SET TO NULL HERE bond_netlink_fini() rtnl_link_unregister() __rtnl_link_unregister() unregister_netdevice_many_notify() bond_uninit() bond_debug_unregister() (commit removed check for bonding_debug_root == NULL) debugfs_remove() simple_recursive_removal() down_write() -> OOPS However, reverting the bad commit does not solve the problem completely because the original code contains a race that could cause the same oops, although it was much less likely to be triggered unintentionally: CPU1 rmmod bonding bonding_exit() bond_destroy_debugfs() debugfs_remove_recursive(bonding_debug_root); CPU2 echo -bond0 > /sys/class/net/bonding_masters bond_uninit() bond_debug_unregister() if (!bonding_debug_root) CPU1 bonding_debug_root = NULL; So do NOT revert the bad commit (since the removed checks were racy anyway), and instead change the order of actions taken during module removal. The same oops can also happen if there is an error during module init, so apply the same fix there.

4.7 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.0 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

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/a45835a0bb6ef7d5ddbc0714dd760de979cb6ece Patch
https://git.kernel.org/stable/c/cf48aee81103ca06d09d73d33fb72f1191069aa6 Patch
https://git.kernel.org/stable/c/f07224c16678a8af54ddc059b3d2d51885d7f35e Patch
https://git.kernel.org/stable/c/a45835a0bb6ef7d5ddbc0714dd760de979cb6ece Patch
https://git.kernel.org/stable/c/cf48aee81103ca06d09d73d33fb72f1191069aa6 Patch
https://git.kernel.org/stable/c/f07224c16678a8af54ddc059b3d2d51885d7f35e Patch
Configurations

Configuration 1 (hide)

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

17 Sep 2025, 16:06

Type Values Removed Values Added
First Time Linux
Linux linux Kernel
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CWE CWE-362
CWE-476
References () https://git.kernel.org/stable/c/a45835a0bb6ef7d5ddbc0714dd760de979cb6ece - () https://git.kernel.org/stable/c/a45835a0bb6ef7d5ddbc0714dd760de979cb6ece - Patch
References () https://git.kernel.org/stable/c/cf48aee81103ca06d09d73d33fb72f1191069aa6 - () https://git.kernel.org/stable/c/cf48aee81103ca06d09d73d33fb72f1191069aa6 - Patch
References () https://git.kernel.org/stable/c/f07224c16678a8af54ddc059b3d2d51885d7f35e - () https://git.kernel.org/stable/c/f07224c16678a8af54ddc059b3d2d51885d7f35e - Patch
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 4.7

21 Nov 2024, 09:27

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/a45835a0bb6ef7d5ddbc0714dd760de979cb6ece - () https://git.kernel.org/stable/c/a45835a0bb6ef7d5ddbc0714dd760de979cb6ece -
References () https://git.kernel.org/stable/c/cf48aee81103ca06d09d73d33fb72f1191069aa6 - () https://git.kernel.org/stable/c/cf48aee81103ca06d09d73d33fb72f1191069aa6 -
References () https://git.kernel.org/stable/c/f07224c16678a8af54ddc059b3d2d51885d7f35e - () https://git.kernel.org/stable/c/f07224c16678a8af54ddc059b3d2d51885d7f35e -
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: vinculación: corrige errores durante rmmod "rmmod bonding" provoca un error desde el commit cc317ea3d927 ("unión: elimina la comprobación NULL redundante en la función debugfs"). Aquí están las funciones relevantes que se llaman: bonding_exit() bond_destroy_debugfs() debugfs_remove_recursive(bonding_debug_root); bonding_debug_root = NULL; &lt;--------- ESTABLECER EN NULL AQUÍ bond_netlink_fini() rtnl_link_unregister() __rtnl_link_unregister() unregister_netdevice_many_notify() bond_uninit() bond_debug_unregister() (confirmar verificación eliminada para bonding_debug_root == NULL) debugfs_remove() simple_recursive_removal() down_write( ) -&gt; OOPS Sin embargo, revertir el compromiso incorrecto no resuelve el problema por completo porque el código original contiene una ejecución que podría causar el mismo error, aunque era mucho menos probable que se activara involuntariamente: CPU1 rmmod bonding bonding_exit() bond_destroy_debugfs() debugfs_remove_recursive(bonding_debug_root); CPU2 echo -bond0 &gt; /sys/class/net/bonding_masters bond_uninit() bond_debug_unregister() if (!bonding_debug_root) CPU1 bonding_debug_root = NULL; Por lo tanto, NO revierta la confirmación incorrecta (ya que las comprobaciones eliminadas eran picantes de todos modos) y, en su lugar, cambie el orden de las acciones tomadas durante la eliminación del módulo. Lo mismo también puede suceder si hay un error durante el inicio del módulo, así que aplique la misma solución allí.

25 Jun 2024, 15:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-06-25 15:15

Updated : 2025-09-17 16:06

NVD link : CVE-2024-39296

Mitre link : CVE-2024-39296

CVE.ORG link : CVE-2024-39296

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CWE-476

NULL Pointer Dereference