CVE-2024-46711

Local MPTCP endpoint reuse denial via counter inflation

Published Sep 13, 2024 · Updated May 11, 2026

Improper MPTCP endpoint accounting in Linux 6.0 through 6.11-rc5 allows local users to interrupt endpoint reuse during a connection. The net/mptcp/pm_netlink.c path increments local_addr_used and add_addr_accepted when an initial-subflow ID 0 endpoint is removed and re-added, although ID 0 is not an additional address. A low-privileged local user must trigger the high-complexity endpoint recreation sequence; a second recreation fails rather than crashing the kernel.

CVSS severity4.7
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

Improper MPTCP endpoint accounting in Linux 6.0 through 6.11-rc5 allows local users to interrupt endpoint reuse during a connection. The net/mptcp/pm_netlink.c path increments local_addr_used and add_addr_accepted when an initial-subflow ID 0 endpoint is removed and re-added, although ID 0 is not an additional address. A low-privileged local user must trigger the high-complexity endpoint recreation sequence; a second recreation fails rather than crashing the kernel.

The record

CVE
CVE-2024-46711
Published
Sep 13, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 13, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=3ad14f54bd7448384458e69f0183843f683ecce8 <119806ae4e46cf239db8e6ad92bc2fd3daae86dc
  2. Affected versionversion=3ad14f54bd7448384458e69f0183843f683ecce8 <53e2173172d26c0617b29dd83618b71664bed1fb
  3. Affected versionversion=3ad14f54bd7448384458e69f0183843f683ecce8 <9366922adc6a71378ca01f898c41be295309f044
  4. Affected versionversion=3ad14f54bd7448384458e69f0183843f683ecce8 <c9c744666f7308a4daba520191e29d395260bcfe
  5. Affected versionversion=6.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3ad14f54bd7448384458e69f0183843f683ecce8 <119806ae4e46cf239db8e6ad92bc2fd3daae86dc; version=3ad14f54bd7448384458e69f0183843f683ecce8 <53e2173172d26c0617b29dd83618b71664bed1fb; version=3ad14f54bd7448384458e69f0183843f683ecce8 <9366922adc6a71378ca01f898c41be295309f044; version=3ad14f54bd7448384458e69f0183843f683ecce8 <c9c744666f7308a4daba520191e29d395260bcfe; version=6.0

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7CanonicalCVSS:3.1/AV:L/AC:H/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

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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

T1499.004Application or System Exploitation

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

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Your stack

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