CVE-2024-27394
"Ao Connect Use-After-Free Vulnerability in Linux Kernel Tcp"
Description
In the Linux kernel, the following vulnerability has been resolved: tcp: Fix Use-After-Free in tcp_ao_connect_init Since call_rcu, which is called in the hlist_for_each_entry_rcu traversal of tcp_ao_connect_init, is not part of the RCU read critical section, it is possible that the RCU grace period will pass during the traversal and the key will be free. To prevent this, it should be changed to hlist_for_each_entry_safe.
INFO
Published Date :
May 14, 2024, 3:12 p.m.
Last Modified :
April 8, 2025, 7:41 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update the Linux kernel package.
- Reboot the system after updating the kernel.
Public PoC/Exploit Available at Github
CVE-2024-27394 has a 4 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-27394.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-27394 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-27394
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
None
Cybersecurity oriented awesome list
awesome awesome-list cybersecurity exploitation reverse-engineering
A collection of links related to Linux kernel security and exploitation
linux-kernel kernel-exploitation exploit privilege-escalation security
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-27394 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-27394 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Apr. 08, 2025
Action Type Old Value New Value Added CPE Configuration OR *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:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.8.9 *cpe:2.3:o:linux:linux_kernel:6.9:rc5:*:*:*:*:*:* Added Reference Type CVE: https://git.kernel.org/stable/c/80e679b352c3ce5158f3f778cfb77eb767e586fb Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/80e679b352c3ce5158f3f778cfb77eb767e586fb Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/ca4fb6c6764b3f75b4f5aa81db1536291897ff7f Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/ca4fb6c6764b3f75b4f5aa81db1536291897ff7f Types: Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/80e679b352c3ce5158f3f778cfb77eb767e586fb Added Reference https://git.kernel.org/stable/c/ca4fb6c6764b3f75b4f5aa81db1536291897ff7f -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Sep. 06, 2024
Action Type Old Value New Value Removed CVSS V3.1 CISA-ADP AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Added CVSS V3.1 CISA-ADP AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 03, 2024
Action Type Old Value New Value Added CWE CISA-ADP CWE-416 Added CVSS V3.1 CISA-ADP AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 29, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: tcp: Fix Use-After-Free in tcp_ao_connect_init Since call_rcu, which is called in the hlist_for_each_entry_rcu traversal of tcp_ao_connect_init, is not part of the RCU read critical section, it is possible that the RCU grace period will pass during the traversal and the key will be free. To prevent this, it should be changed to hlist_for_each_entry_safe. Added Reference kernel.org https://git.kernel.org/stable/c/ca4fb6c6764b3f75b4f5aa81db1536291897ff7f [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/80e679b352c3ce5158f3f778cfb77eb767e586fb [No types assigned]