CVE-2022-50071

mptcp: move subflow cleanup in mptcp_destroy_common()

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.

N/A

CVSS

Severity:

EPSS 0.02%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/6139039c8fc5c9dbcdc3ad389b9a6d0cacb4d693
https://git.kernel.org/stable/c/c0bf3c6aa444a5ef44acc57ef6cfa53fd4fc1c9b

Frequently Asked Questions

What is the severity of CVE-2022-50071?: CVE-2022-50071 has not yet been assigned a CVSS score.
How to fix CVE-2022-50071?: To fix CVE-2022-50071, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-50071 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2022-50071 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-50071?: CVE-2022-50071 affects Linux Linux, Linux Linux.

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