CVE-2024-35894

Kernel compromise via cross-scope MPTCP socket access

Published May 19, 2024 · Updated Aug 5, 2026

Improper access control in affected Linux kernel releases starting at 6.7 allows local users to compromise kernel confidentiality, integrity, and availability. In net/mptcp/sockopt.c, mptcp_set_rcvlowat accepts a BPF setsockopt operation from a TCP subflow and applies MPTCP-level proto_ops in the wrong socket scope. Reachability requires local access and permission to run a cgroup BPF sock-ops program; the demonstrated trigger produces a kernel warning.

CVSS severity7.8
High
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

Improper access control in affected Linux kernel releases starting at 6.7 allows local users to compromise kernel confidentiality, integrity, and availability. In net/mptcp/sockopt.c, mptcp_set_rcvlowat accepts a BPF setsockopt operation from a TCP subflow and applies MPTCP-level proto_ops in the wrong socket scope. Reachability requires local access and permission to run a cgroup BPF sock-ops program; the demonstrated trigger produces a kernel warning.

The record

CVE
CVE-2024-35894
Published
May 19, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=124a4885b55f3039c697feb53edc5ad88bf21161 <ee3c845787b621cfe82c2e52c513024a9d7a78f5
  2. Affected versionversion=5684ab1a0effbfeb706f47d85785f653005b97b1 <3ffb1ab698376f09cc33101c07c1be229389fe29
  3. Affected versionversion=5684ab1a0effbfeb706f47d85785f653005b97b1 <fcf4692fa39e86a590c14a4af2de704e1d20a3b5
  4. Affected versionversion=6.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=124a4885b55f3039c697feb53edc5ad88bf21161 <ee3c845787b621cfe82c2e52c513024a9d7a78f5; version=5684ab1a0effbfeb706f47d85785f653005b97b1 <3ffb1ab698376f09cc33101c07c1be229389fe29; version=5684ab1a0effbfeb706f47d85785f653005b97b1 <fcf4692fa39e86a590c14a4af2de704e1d20a3b5; version=6.7

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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