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Description
Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
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Title: kernel de Linux
Description: En el kernel de Linux, se resolvió la siguiente vulnerabilidad: Bluetooth: Corrección de doble liberación en hci_conn_cleanup syzbot informa un use after free de slab en hci_conn_hash_flush [1]. Después de liberar un objeto usando hci_conn_del_sysfs en la función hci_conn_cleanup, liberar el mismo objeto nuevamente usando las funciones hci_dev_put y hci_conn_put provoca un double free. Aquí hay un flujo simplificado: hci_conn_del_sysfs: hci_dev_put put_device kobject_put kref_put kobject_release kobject_cleanup kfree_const kfree(name) hci_dev_put: ... kfree(name) hci_conn_put: put_device ... kfree(name) Este parche elimina la llamada a las funciones hci_dev_put y hci_conn_put en hci_con función n_cleanup, porque el objeto se libera en la función hci_conn_del_sysfs. Este parche también corrige el recuento en hci_conn_add_sysfs() y hci_conn_del_sysfs() para tener en cuenta las fallas de device_add(). Esto corrige CVE-2023-28464.
CVE Modified by kernel.org5/22/2024 8:15:09 AM
Action
Type
Old Value
New Value
Changed
Description
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: Fix double free in hci_conn_cleanup
syzbot reports a slab use-after-free in hci_conn_hash_flush [1].
After releasing an object using hci_conn_del_sysfs in the
hci_conn_cleanup function, releasing the same object again
using the hci_dev_put and hci_conn_put functions causes a double free.
Here's a simplified flow:
hci_conn_del_sysfs:
hci_dev_put
put_device
kobject_put
kref_put
kobject_release
kobject_cleanup
kfree_const
kfree(name)
hci_dev_put:
...
kfree(name)
hci_conn_put:
put_device
...
kfree(name)
This patch drop the hci_dev_put and hci_conn_put function
call in hci_conn_cleanup function, because the object is
freed in hci_conn_del_sysfs function.
This patch also fixes the refcounting in hci_conn_add_sysfs() and
hci_conn_del_sysfs() to take into account device_add() failures.
This fixes CVE-2023-28464.
Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
New CVE Received from kernel.org5/21/2024 12:15:20 PM
Action
Type
Old Value
New Value
Added
Description
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: Fix double free in hci_conn_cleanup
syzbot reports a slab use-after-free in hci_conn_hash_flush [1].
After releasing an object using hci_conn_del_sysfs in the
hci_conn_cleanup function, releasing the same object again
using the hci_dev_put and hci_conn_put functions causes a double free.
Here's a simplified flow:
hci_conn_del_sysfs:
hci_dev_put
put_device
kobject_put
kref_put
kobject_release
kobject_cleanup
kfree_const
kfree(name)
hci_dev_put:
...
kfree(name)
hci_conn_put:
put_device
...
kfree(name)
This patch drop the hci_dev_put and hci_conn_put function
call in hci_conn_cleanup function, because the object is
freed in hci_conn_del_sysfs function.
This patch also fixes the refcounting in hci_conn_add_sysfs() and
hci_conn_del_sysfs() to take into account device_add() failures.
This fixes CVE-2023-28464.
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