CVE-2025-38552 (GCVE-0-2025-38552)

Vulnerability from cvelistv5 – Published: 2025-08-16 11:34 – Updated: 2026-08-05 12:02
VLAI
Title
mptcp: plug races between subflow fail and subflow creation
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.
Severity
9.4 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 478d770008b03ed9d74bdc8add2315b7fd124ecc , < c476d627584b7589a134a8b48dd5c6639e4401c5 (git)
Affected: 478d770008b03ed9d74bdc8add2315b7fd124ecc , < 7c96d519ee15a130842a6513530b4d20acd2bfcd (git)
Affected: 478d770008b03ed9d74bdc8add2315b7fd124ecc , < f81b6fbe13c7fc413b5158cdffc6a59391a2a8db (git)
Affected: 478d770008b03ed9d74bdc8add2315b7fd124ecc , < 659da22dee5ff316ba63bdaeeac7b58b5442f6c2 (git)
Affected: 478d770008b03ed9d74bdc8add2315b7fd124ecc , < def5b7b2643ebba696fc60ddf675dca13f073486 (git)
Create a notification for this product.
Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 6.1.149 , ≤ 6.1.* (semver)
Unaffected: 6.6.101 , ≤ 6.6.* (semver)
Unaffected: 6.12.40 , ≤ 6.12.* (semver)
Unaffected: 6.15.8 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Siemens SIMATIC CN 4100 Affected: 0 , < V5.0 (custom)
Create a notification for this product.
Show details on NVD website
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      "cve": "CVE-2025-38552",
      "id": "CVE-2025-38552",
      "initial_release_date": "2025-08-16T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mptcp: plug races between subflow fail and subflow creation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38552.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-19T17:48:58Z",
      "cve": "CVE-2025-38552",
      "id": "CVE-2025-38552",
      "initial_release_date": "2025-08-18T23:22:26Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "399",
      "product_status:known_not_affected": "281",
      "product_status:recommended": "500",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-38552",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-38552.json",
      "version": "52"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.