Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2024-27394

Severity CVSS v4.0:
Pending analysis
Type:
CWE-416 Use After Free
Publication date:
14/05/2024
Last modified:
08/04/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> tcp: Fix Use-After-Free in tcp_ao_connect_init<br /> <br /> Since call_rcu, which is called in the hlist_for_each_entry_rcu traversal<br /> of tcp_ao_connect_init, is not part of the RCU read critical section, it<br /> is possible that the RCU grace period will pass during the traversal and<br /> the key will be free.<br /> <br /> To prevent this, it should be changed to hlist_for_each_entry_safe.

Impact

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

Base Score: 7.40 HIGH
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

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

Base Score 3.x
7.40
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.7 (including) 6.8.9 (excluding)
cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.9:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.9:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.9:rc5:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools