CVE-2025-38552Critical· 9.4▾ MidnightIn 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 sub…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 51.7 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 15.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.3%
0.3% → 0.3%
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.
linux_kernel >= 5.15, < 6.1.149linux_kernel >= 6.2, < 6.6.101linux_kernel >= 6.7, < 6.12.40linux_kernel >= 6.13, < 6.15.8linux_kernel = 6.16debian_linux = 11.0Upgrade past the affected range:
linux_kernel 6.15.8Connected by shared product, vendor, weakness, or advisory.
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