CVE-2022-50071

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.

Reserved 2025-06-18 | Published 2025-06-18 | Updated 2025-06-18 | Assigner Linux

Product status

Default status
unaffected

e16163b6e2b720fb74e5af758546f6dad27e6c9e before 6139039c8fc5c9dbcdc3ad389b9a6d0cacb4d693
affected

e16163b6e2b720fb74e5af758546f6dad27e6c9e before c0bf3c6aa444a5ef44acc57ef6cfa53fd4fc1c9b
affected

Default status
affected

5.11
affected

Any version before 5.11
unaffected

5.19.4
unaffected

6.0
unaffected

References

git.kernel.org/...c/6139039c8fc5c9dbcdc3ad389b9a6d0cacb4d693

git.kernel.org/...c/c0bf3c6aa444a5ef44acc57ef6cfa53fd4fc1c9b

cve.org (CVE-2022-50071)

nvd.nist.gov (CVE-2022-50071)

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