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9.4 Critical

CVE-2025-38552 In the Linux kernel, the following vulnerability has been resolved: mptcp: plug races between subflow fail and subflow…

Description

In the Linux kernel, the following vulnerability has been resolved: mptcp: plug races between subflow fail and subflow creation We have races similar to the one addressed by the previous patch between subflow failing and additional subflow creation. They are just harder to trigger. The solution is similar. Use a separate flag to track the condition 'socket state prevent any additional subflow creation' protected by the fallback lock. The socket fallback makes such flag true, and also receiving or sending an MP_FAIL option. The field 'allow_infinite_fallback' is now always touched under the relevant lock, we can drop the ONCE annotation on write.

Affected products and versions

Product Affected versions Fixed in
Linux 6.16 earliest → < 6.16 6.16
Linux 6.15 earliest → < 6.15.8 6.15.8
Linux 6.12 earliest → < 6.12.40 6.12.40
Linux 6.6 earliest → < 6.6.101 6.6.101
Linux 6.1 earliest → < 6.1.149 6.1.149
Linux 5.15 No fix stated
SIMATIC CN 4100 5.0 earliest → < 5.0 5.0

References

Timeline

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