CVE-2025-38552
Linux Kernel vulnerability
- Published16 Aug 2025
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.
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:HAffected products
Remediation
- https://git.kernel.org/stable/c/659da22dee5ff316ba63bdaeeac7b58b5442f6c2
- https://git.kernel.org/stable/c/7c96d519ee15a130842a6513530b4d20acd2bfcd
- https://git.kernel.org/stable/c/c476d627584b7589a134a8b48dd5c6639e4401c5
- https://git.kernel.org/stable/c/def5b7b2643ebba696fc60ddf675dca13f073486
- https://git.kernel.org/stable/c/f81b6fbe13c7fc413b5158cdffc6a59391a2a8db
References
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html
- https://git.kernel.org/stable/c/659da22dee5ff316ba63bdaeeac7b58b5442f6c2
- https://git.kernel.org/stable/c/7c96d519ee15a130842a6513530b4d20acd2bfcd
- https://git.kernel.org/stable/c/c476d627584b7589a134a8b48dd5c6639e4401c5
- https://git.kernel.org/stable/c/def5b7b2643ebba696fc60ddf675dca13f073486
- https://git.kernel.org/stable/c/f81b6fbe13c7fc413b5158cdffc6a59391a2a8db
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
Frequently asked
Is CVE-2025-38552 being actively exploited?
CVE-2025-38552 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.32%.
How severe is CVE-2025-38552?
CVE-2025-38552 has a CVSS 3.1 base score of 9.4, rated critical. EPSS estimates a 0.32% probability of exploitation.
Which products are affected by CVE-2025-38552?
Affected products include Debian Linux, Linux Kernel.
How do I fix CVE-2025-38552?
Upgrade affected software to a fixed version, for example Linux Kernel 6.1.149 or later, then confirm no affected versions remain in your inventory.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2025-38552 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.