CVE-2024-35840

Service interruption via uninitialized MPTCP option state

Published May 17, 2024 · Updated May 11, 2026

Improper option-state handling in affected Linux kernels allows local users to interrupt service through crafted MPTCP connections. subflow_finish_connect() accepts the general MP_JOIN flag before reading backup, join_id, thmac, and none, although those fields are initialized only for MP_JOIN SYN/ACK options. The published assessment requires local low-privilege access and reports availability loss, but it does not specify whether the result is a hang, crash, or reboot.

CVSS severity5.5

Medium

EPSS probability0.22%

Next 30 days · Sep 16, 2026

Known exploitationUnconfirmed

Based on sourced intelligence

Hinoki checkNot available

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Summary

What happened

The record

CVE: CVE-2024-35840
Published: May 17, 2024
Updated: May 11, 2026

Vendor: The Linux Kernel Organization
Product: Linux
Classifications: Unavailable

Attack vector: local
Privileges: authenticated

Timeline

How it unfolded

May 17, 2024CVE publishedPublication date reported by the CVE source.
May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

Affected versionversion=5.7
Affected versionversion=f296234c98a8fcec94eec80304a873f635d350ea <413b913507326972135d2977975dbff8b7f2c453
Affected versionversion=f296234c98a8fcec94eec80304a873f635d350ea <51e4cb032d49ce094605f27e45eabebc0408893c
Affected versionversion=f296234c98a8fcec94eec80304a873f635d350ea <76e8de7273a22a00d27e9b8b7d4d043d6433416a
Affected versionversion=f296234c98a8fcec94eec80304a873f635d350ea <ad3e8f5c3d5c53841046ef7a947c04ad45a20721
Affected versionversion=f296234c98a8fcec94eec80304a873f635d350ea <be1d9d9d38da922bd4beeec5b6dd821ff5a1dfeb

What conditions does exploitation require?

Attack vectorlocal

Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.7; version=f296234c98a8fcec94eec80304a873f635d350ea <413b913507326972135d2977975dbff8b7f2c453; version=f296234c98a8fcec94eec80304a873f635d350ea <51e4cb032d49ce094605f27e45eabebc0408893c; version=f296234c98a8fcec94eec80304a873f635d350ea <76e8de7273a22a00d27e9b8b7d4d043d6433416a; version=f296234c98a8fcec94eec80304a873f635d350ea <ad3e8f5c3d5c53841046ef7a947c04ad45a20721; version=f296234c98a8fcec94eec80304a873f635d350ea <be1d9d9d38da922bd4beeec5b6dd821ff5a1dfeb

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026

Latest reporting daySep 16, 2026

Latest daily unique IPsUnavailable

Prior 30-day averageUnavailable

SourceShadowserver honeypots (KEV)

Vectorlocal

Privilegesauthenticated

Known exploitationUnconfirmed

Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

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