CVE-2025-38552

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux478d770008b03ed9d74bdc8add2315b7fd124ecc < c476d627584b7589a134a8b48dd5c6639e4401c5affected
LinuxLinux478d770008b03ed9d74bdc8add2315b7fd124ecc < 7c96d519ee15a130842a6513530b4d20acd2bfcdaffected
LinuxLinux478d770008b03ed9d74bdc8add2315b7fd124ecc < f81b6fbe13c7fc413b5158cdffc6a59391a2a8dbaffected
LinuxLinux478d770008b03ed9d74bdc8add2315b7fd124ecc < 659da22dee5ff316ba63bdaeeac7b58b5442f6c2affected
LinuxLinux478d770008b03ed9d74bdc8add2315b7fd124ecc < def5b7b2643ebba696fc60ddf675dca13f073486affected
LinuxLinux5.15affected
LinuxLinux0 < 5.15unaffected
LinuxLinux6.1.149 <= 6.1.*unaffected
LinuxLinux6.6.101 <= 6.6.*unaffected
LinuxLinux6.12.40 <= 6.12.*unaffected
LinuxLinux6.15.8 <= 6.15.*unaffected
LinuxLinux6.16 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

Additional References

References