mptcp: plug races between subflow fail and subflow creation

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-38552
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-08-16 12:15:31 UTC
Updated2026-05-12 13:16:52 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 478d770008b03ed9d74bdc8add2315b7fd124ecc c476d627584b7589a134a8b48dd5c6639e4401c5 git Not specified
CNA Linux Linux affected 478d770008b03ed9d74bdc8add2315b7fd124ecc 7c96d519ee15a130842a6513530b4d20acd2bfcd git Not specified
CNA Linux Linux affected 478d770008b03ed9d74bdc8add2315b7fd124ecc f81b6fbe13c7fc413b5158cdffc6a59391a2a8db git Not specified
CNA Linux Linux affected 478d770008b03ed9d74bdc8add2315b7fd124ecc 659da22dee5ff316ba63bdaeeac7b58b5442f6c2 git Not specified
CNA Linux Linux affected 478d770008b03ed9d74bdc8add2315b7fd124ecc def5b7b2643ebba696fc60ddf675dca13f073486 git Not specified
CNA Linux Linux affected 5.15 Not specified
CNA Linux Linux unaffected 5.15 semver Not specified
CNA Linux Linux unaffected 6.1.149 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.101 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.40 6.12.* semver Not specified
CNA Linux Linux unaffected 6.15.8 6.15.* semver Not specified
CNA Linux Linux unaffected 6.16 * original_commit_for_fix Not specified
ADP Siemens SIMATIC CN 4100 affected V5.0 custom Not specified

References

ReferenceSourceLinkTags
lists.debian.org/debian-lts-announce/2025/10/msg00008.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
git.kernel.org/stable/c/f81b6fbe13c7fc413b5158cdffc6a59391a2a8db 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c476d627584b7589a134a8b48dd5c6639e4401c5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/def5b7b2643ebba696fc60ddf675dca13f073486 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/659da22dee5ff316ba63bdaeeac7b58b5442f6c2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-032379.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/7c96d519ee15a130842a6513530b4d20acd2bfcd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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