Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2024-56654

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
27/12/2024
Last modified:
06/01/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> Bluetooth: hci_event: Fix using rcu_read_(un)lock while iterating<br /> <br /> The usage of rcu_read_(un)lock while inside list_for_each_entry_rcu is<br /> not safe since for the most part entries fetched this way shall be<br /> treated as rcu_dereference:<br /> <br /> Note that the value returned by rcu_dereference() is valid<br /> only within the enclosing RCU read-side critical section [1]_.<br /> For example, the following is **not** legal::<br /> <br /> rcu_read_lock();<br /> p = rcu_dereference(head.next);<br /> rcu_read_unlock();<br /> x = p-&gt;address; /* BUG!!! */<br /> rcu_read_lock();<br /> y = p-&gt;data; /* BUG!!! */<br /> rcu_read_unlock();

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.4.16 (including) 6.5 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.5.3 (including) 6.6.67 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.7 (including) 6.12.6 (excluding)
cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools