What is CVE-2024-27394?

CVE-2024-27394 is a High severity Linux kernel vulnerability with a CVSS score of 7.4 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 6.7 onward and patched in 6.8.9 and 6.9. CVE-2024-27394 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-27394?

CVE-2024-27394 has a CVSS score of 7.4 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2024-27394?

Yes, CVE-2024-27394 has been patched. Fixed versions include 6.8.9 and 6.9. If you are running Linux kernel 6.7 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-27394 actively exploited?

CVE-2024-27394 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2024-27394

High

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.

Package Linux Kernel

Published 2024-05-14

Last modified 2025-04-08

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.4

out of 10

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-416

CVE-2024-27394 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.7 and later are affected. Fixed in 6.8.9, 6.9 and their respective stable series.

Affected from

≥ 6.7

Fixed in

✓ 6.8.9 6.8.x ✓ 6.9

References

2 total

Kernel Git
https://git.kernel.org/stable/c/80e679b352c3ce5158f3f778cfb77eb767e586fb

Patch
Kernel Git
https://git.kernel.org/stable/c/ca4fb6c6764b3f75b4f5aa81db1536291897ff7f

Patch

Details

CVE ID CVE-2024-27394

Severity High

CVSS score 7.4 / 10

CVSS version 3.1

Published 2024-05-14

Modified 2025-04-08

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-27394?

CVE-2024-27394 is a High severity Linux kernel vulnerability with a CVSS score of 7.4 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 6.7 onward and has been patched in 6.8.9 and 6.9. CVE-2024-27394 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-27394?

CVE-2024-27394 has a CVSS score of 7.4 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2024-27394?

Yes. CVE-2024-27394 has been patched. Fixed versions include 6.8.9 and 6.9. If you are running Linux kernel 6.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-27394 actively exploited?

No. CVE-2024-27394 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.