CVE-2024-56654

Summary

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();

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa0bfde167b506423111ddb8cd71930497a40fc54 < 0108132d7d76d884e443d18b4f067cdf2811911baffected
LinuxLinuxa0bfde167b506423111ddb8cd71930497a40fc54 < f9ecc90b5d501b3a5a62d0685d5104f934bb0104affected
LinuxLinuxa0bfde167b506423111ddb8cd71930497a40fc54 < 581dd2dc168fe0ed2a7a5534a724f0d3751c93aeaffected
LinuxLinuxb475c1109251e30ec21fb574d72a1c71a4ab0039affected
LinuxLinux2ccde10127447c1a5caad8469fede945bdb62fdfaffected
LinuxLinux6.4.16 < 6.5affected
LinuxLinux6.5.3 < 6.6affected
LinuxLinux6.6affected
LinuxLinux0 < 6.6unaffected
LinuxLinux6.6.67 <= 6.6.*unaffected
LinuxLinux6.12.6 <= 6.12.*unaffected
LinuxLinux6.13 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References