CVE-2022-50071
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-06-18

Last updated on: 2025-11-17

Assigner: kernel.org

Description
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.
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Meta Information
Published
2025-06-18
Last Modified
2025-11-17
Generated
2026-05-07
AI Q&A
2025-06-18
EPSS Evaluated
2026-05-05
NVD
CVE-2022-50071
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-NVD-CWE-noinfo
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AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability occurs in the Linux kernel's Multipath TCP (MPTCP) implementation. When the creation of an MPTCP socket fails due to a CGROUP_INET_SOCK_CREATE eBPF program, the protocol leaks all the subflows because the cleanup function __mptcp_destroy_sock() is not called in this failure path. The fix involves moving the subflow sockets cleanup to the mptcp_destroy_common() helper, which is invoked in every socket cleanup path, preventing the leak.


How can this vulnerability impact me? :

The vulnerability can lead to resource leaks in the Linux kernel's MPTCP implementation, specifically leaking subflow sockets when socket creation fails. This could potentially cause increased resource consumption, leading to degraded system performance or denial of service due to exhaustion of socket resources.


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