What is CVE-2024-35840?

CVE-2024-35840 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.7 onward and patched in 5.15.148, 6.1.75, 6.6.14 and others. CVE-2024-35840 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-35840?

CVE-2024-35840 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2024-35840?

Yes, CVE-2024-35840 has been patched. Fixed versions include 5.15.148, 6.1.75, 6.6.14 and others. If you are running Linux kernel 5.7 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-35840 actively exploited?

CVE-2024-35840 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2024-35840

Medium

In the Linux kernel, the following vulnerability has been resolved: mptcp: use OPTION_MPTCP_MPJ_SYNACK in subflow_finish_connect() subflow_finish_connect() uses four fields (backup, join_id, thmac, none) that may contain garbage unless OPTION_MPTCP_MPJ_SYNACK has been set in mptcp_parse_option()

Package Linux Kernel

Published 2024-05-17

Last modified 2025-09-24

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Affected versions

Linux kernel versions 5.7 and later are affected. Fixed in 5.15.148, 6.1.75, 6.6.14, 6.7.2, 6.8 and their respective stable series.

Affected from

≥ 5.7

Fixed in

✓ 5.15.148 5.15.x ✓ 6.1.75 6.1.x ✓ 6.6.14 6.6.x ✓ 6.7.2 6.7.x ✓ 6.8

References

5 total

Kernel Git
https://git.kernel.org/stable/c/413b913507326972135d2977975dbff8b7f2c453

Patch
Kernel Git
https://git.kernel.org/stable/c/51e4cb032d49ce094605f27e45eabebc0408893c

Patch
Kernel Git
https://git.kernel.org/stable/c/76e8de7273a22a00d27e9b8b7d4d043d6433416a

Patch
Kernel Git
https://git.kernel.org/stable/c/ad3e8f5c3d5c53841046ef7a947c04ad45a20721

Patch
Kernel Git
https://git.kernel.org/stable/c/be1d9d9d38da922bd4beeec5b6dd821ff5a1dfeb

Patch

Details

CVE ID CVE-2024-35840

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-17

Modified 2025-09-24

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-35840?

CVE-2024-35840 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.7 onward and has been patched in 5.15.148, 6.1.75, 6.6.14 and others. CVE-2024-35840 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-35840?

CVE-2024-35840 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2024-35840?

Yes. CVE-2024-35840 has been patched. Fixed versions include 5.15.148, 6.1.75, 6.6.14 and others. If you are running Linux kernel 5.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-35840 actively exploited?

No. CVE-2024-35840 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.