CVE-2022-50071None▾ Sunlit

mptcp: move subflow cleanup in mptcp_destroy_common()

In the Linux kernel, the following vulnerability has been resolved: mptcp: move subflow cleanup in mptcp_destroy_common() If the mptcp socket creation fails due to a CGROUP_INET_SOCK_CREATE eBPF program, the MPTCP protocol ends-up leak…

▾ Sunlit zone — Low / medium · no exploitation signal

Depth score3/ 100 · Minimal

impact 2.8 · likelihood 0 · exploitation 0

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Proof of concept

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Published

Jun 18, 2025

Updated

Nov 5, 2026

CVSS

—

Vendor

Linux

Product

Linux

CWE

—

Depth score

3 · Minimal

EPSS

0.24% · p15

Platforms

—

Source

CVEORG

Vector

—

CISA SSVC

decided 2026-11-05

Exploitation: none
Automatable: no
Technical impact: partial

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Nov 5.

0.2% → 0.2%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 505 days

Jun 18, 2025Published
Disclosed via CVEORG
Nov 5, 2026Record revised
Last analysed / modified upstream
Nov 5, 2026EPSS first tracked
0.2%

Linux #cve.org

Affected

Linux >= e16163b6e2b720fb74e5af758546f6dad27e6c9e < 6139039c8fc5c9dbcdc3ad389b9a6d0cacb4d693
Linux >= e16163b6e2b720fb74e5af758546f6dad27e6c9e < c0bf3c6aa444a5ef44acc57ef6cfa53fd4fc1c9b
Linux 5.11

Full technical detail▾

Overview

In the Linux kernel, the following vulnerability has been resolved:

mptcp: move subflow cleanup in mptcp_destroy_common()

If the mptcp socket creation fails due to a CGROUP_INET_SOCK_CREATE eBPF program, the MPTCP protocol ends-up leaking all the subflows: the related cleanup happens in __mptcp_destroy_sock() that is not invoked in such code path.

Address the issue moving the subflow sockets cleanup in the mptcp_destroy_common() helper, which is invoked in every msk cleanup path.

Additionally get rid of the intermediate list_splice_init step, which is an unneeded relic from the past.

The issue is present since before the reported root cause commit, but any attempt to backport the fix before that hash will require a complete rewrite.

Affected

Linux >= e16163b6e2b720fb74e5af758546f6dad27e6c9e < 6139039c8fc5c9dbcdc3ad389b9a6d0cacb4d693
Linux >= e16163b6e2b720fb74e5af758546f6dad27e6c9e < c0bf3c6aa444a5ef44acc57ef6cfa53fd4fc1c9b
Linux 5.11

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#cve.org

mptcp: move subflow cleanup in mptcp_destroy_common()

▾ Sunlit zone — Low / medium · no exploitation signal

Depth score3/ 100 · Minimal

impact 2.8 · likelihood 0 · exploitation 0

Overview

In the Linux kernel, the following vulnerability has been resolved:

mptcp: move subflow cleanup in mptcp_destroy_common()

Address the issue moving the subflow sockets cleanup in the mptcp_destroy_common() helper, which is invoked in every msk cleanup path.

Additionally get rid of the intermediate list_splice_init step, which is an unneeded relic from the past.

The issue is present since before the reported root cause commit, but any attempt to backport the fix before that hash will require a complete rewrite.