What is CVE-2024-40939?

CVE-2024-40939 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 5.16 onward and patched in 6.1.95, 6.6.35, 6.9.6 and others. CVE-2024-40939 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-40939?

CVE-2024-40939 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2024-40939?

Yes, CVE-2024-40939 has been patched. Fixed versions include 6.1.95, 6.6.35, 6.9.6 and others. If you are running Linux kernel 5.16 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-40939 actively exploited?

CVE-2024-40939 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-2024-40939

High

In the Linux kernel, the following vulnerability has been resolved: net: wwan: iosm: Fix tainted pointer delete is case of region creation fail In case of region creation fail in ipc_devlink_create_region(), previously created regions delete process starts from tainted pointer which actually holds error code value. Fix this bug by decreasing region index before delete. Found by Linux Verification Center (linuxtesting.org) with SVACE.

Package Linux Kernel

Published 2024-07-12

Last modified 2025-11-03

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2024-40939 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 5.16 and later are affected. Fixed in 6.1.95, 6.6.35, 6.9.6, 6.10 and their respective stable series.

Affected from

≥ 5.16

Fixed in

✓ 6.1.95 6.1.x ✓ 6.6.35 6.6.x ✓ 6.9.6 6.9.x ✓ 6.10

References

5 total

Kernel Git
https://git.kernel.org/stable/c/040d9384870386eb5dc55472ac573ac7756b2050

Patch
Kernel Git
https://git.kernel.org/stable/c/37a438704d19bdbe246d51d3749b6b3a8fe65afd

Patch
Kernel Git
https://git.kernel.org/stable/c/b0c9a26435413b81799047a7be53255640432547

Patch
Kernel Git
https://git.kernel.org/stable/c/fe394d59cdae81389dbf995e87c83c1acd120597

Patch
Debian Security
https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Details

CVE ID CVE-2024-40939

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-07-12

Modified 2025-11-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-40939?

CVE-2024-40939 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 5.16 onward and has been patched in 6.1.95, 6.6.35, 6.9.6 and others. CVE-2024-40939 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-40939?

CVE-2024-40939 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2024-40939?

Yes. CVE-2024-40939 has been patched. Fixed versions include 6.1.95, 6.6.35, 6.9.6 and others. If you are running Linux kernel 5.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-40939 actively exploited?

No. CVE-2024-40939 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.