CVE-2022-50071

Local resource exhaustion via MPTCP subflow leak

Published Jun 18, 2025 · Updated May 11, 2026

Resource exhaustion in Linux kernel 5.11 through 5.19.3 allows local users to leak subflow sockets by failing MPTCP creation. The MPTCP teardown path calls __mptcp_destroy_sock() for normal cleanup, but a CGROUP_INET_SOCK_CREATE eBPF rejection bypasses that helper and leaves every associated subflow allocated. Triggering the condition requires a local eBPF hook that rejects socket creation; repetition can consume kernel resources and interrupt service.

CVSS severity7.8
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Linux kernel 5.11 through 5.19.3 allows local users to leak subflow sockets by failing MPTCP creation. The MPTCP teardown path calls __mptcp_destroy_sock() for normal cleanup, but a CGROUP_INET_SOCK_CREATE eBPF rejection bypasses that helper and leaves every associated subflow allocated. Triggering the condition requires a local eBPF hook that rejects socket creation; repetition can consume kernel resources and interrupt service.

The record

CVE
CVE-2022-50071
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE 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=5.11
  2. Affected versionversion=e16163b6e2b720fb74e5af758546f6dad27e6c9e <6139039c8fc5c9dbcdc3ad389b9a6d0cacb4d693
  3. Affected versionversion=e16163b6e2b720fb74e5af758546f6dad27e6c9e <c0bf3c6aa444a5ef44acc57ef6cfa53fd4fc1c9b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.11; version=e16163b6e2b720fb74e5af758546f6dad27e6c9e <6139039c8fc5c9dbcdc3ad389b9a6d0cacb4d693; version=e16163b6e2b720fb74e5af758546f6dad27e6c9e <c0bf3c6aa444a5ef44acc57ef6cfa53fd4fc1c9b

Published CVSS scores

7.8NVDCVSS: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

T1499.001Endpoint Denial of Service: OS Exhaustion Flood

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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