CVE ID : CVE-2024-56654

Published : Dec. 27, 2024, 3:15 p.m. | 1 hour ago

Description : In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_event: Fix using rcu_read_(un)lock while iterating

The usage of rcu_read_(un)lock while inside list_for_each_entry_rcu is
not safe since for the most part entries fetched this way shall be
treated as rcu_dereference:

Note that the value returned by rcu_dereference() is valid
only within the enclosing RCU read-side critical section [1]_.
For example, the following is **not** legal::

rcu_read_lock();
p = rcu_dereference(head.next);
rcu_read_unlock();
x = p->address; /* BUG!!! */
rcu_read_lock();
y = p->data; /* BUG!!! */
rcu_read_unlock();

Severity: 0.0 | NA

Visit the link for more details, such as CVSS details, affected products, timeline, and more…