CVE-2024-53122Network attack vector

Kernel crash via racing MPTCP subflow cleanup

Published Dec 2, 2024 · Updated Aug 5, 2026

Race condition in the MPTCP receive-buffer cleanup path in Linux allows remote attackers to crash the kernel over a network. mptcp_rcv_space_adjust calls tcp_cleanup_rbuf on newly inserted subflows before their handshake completes, allowing a racing recvmsg operation to cause division by zero. A reachable MPTCP flow and timing overlap with in-kernel subflow creation are required; the reported consequence is availability loss only.

CVSS severity7.5
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the MPTCP receive-buffer cleanup path in Linux allows remote attackers to crash the kernel over a network. mptcp_rcv_space_adjust calls tcp_cleanup_rbuf on newly inserted subflows before their handshake completes, allowing a racing recvmsg operation to cause division by zero. A reachable MPTCP flow and timing overlap with in-kernel subflow creation are required; the reported consequence is availability loss only.

The record

CVE
CVE-2024-53122
Published
Dec 2, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-362, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 2, 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

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.

  1. Affected versionversion=5.10
  2. Affected versionversion=c76c6956566f974bac2470bd72fc22fb923e04a1 <0a9a182ea5c7bb0374e527130fd85024ace7279b
  3. Affected versionversion=c76c6956566f974bac2470bd72fc22fb923e04a1 <24995851d58c4a205ad0ffa7b2f21e479a9c8527
  4. Affected versionversion=c76c6956566f974bac2470bd72fc22fb923e04a1 <aad6412c63baa39dd813e81f16a14d976b3de2e8
  5. Affected versionversion=c76c6956566f974bac2470bd72fc22fb923e04a1 <ce7356ae35943cc6494cc692e62d51a734062b7d
  6. Affected versionversion=c76c6956566f974bac2470bd72fc22fb923e04a1 <ff825ab2f455299c0c7287550915a8878e2a66e0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.10; version=c76c6956566f974bac2470bd72fc22fb923e04a1 <0a9a182ea5c7bb0374e527130fd85024ace7279b; version=c76c6956566f974bac2470bd72fc22fb923e04a1 <24995851d58c4a205ad0ffa7b2f21e479a9c8527; version=c76c6956566f974bac2470bd72fc22fb923e04a1 <aad6412c63baa39dd813e81f16a14d976b3de2e8; version=c76c6956566f974bac2470bd72fc22fb923e04a1 <ce7356ae35943cc6494cc692e62d51a734062b7d; version=c76c6956566f974bac2470bd72fc22fb923e04a1 <ff825ab2f455299c0c7287550915a8878e2a66e0

Published CVSS scores

7.5kernel.orgCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1499Endpoint Denial of Service

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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