Vulnerability-Lookup

FKIE_CVE-2026-46137

Vulnerability from fkie_nvd - Published: 2026-05-28 10:16 - Updated: 2026-06-24 17:32

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: ADD_ADDR rtx: fix potential data-race This mptcp_pm_add_timer() helper is executed as a timer callback in softirq context. To avoid any data races, the socket lock needs to be held with bh_lock_sock(). If the socket is in use, retry again soon after, similar to what is done with the keepalive timer.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/013dcdc1961543b9a3433466bc8c79a2f4ca75b5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/23079e0b7742ec114d3507c3e3aad01b7b69e4af	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2ad56e434199ca24a812bb353667aa1c3860f513	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5cd6e0ad79d2615264f63929f8b457ad97ae550d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6e4710d7d8782cb61af29a7e7111ddfc38b9e1a3	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b35605e1f1e877038c8c9d499babbc891cdd234f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cc3c0399361efaaf7ae64262eb3f70829b1189c6	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d9b272a85fe6b8f993e37915311e4038c814a533	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.1
linux	linux_kernel	7.1

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mptcp/pm.c"
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: pm: ADD_ADDR rtx: fix potential data-race\n\nThis mptcp_pm_add_timer() helper is executed as a timer callback in\nsoftirq context. To avoid any data races, the socket lock needs to be\nheld with bh_lock_sock().\n\nIf the socket is in use, retry again soon after, similar to what is done\nwith the keepalive timer."
    }
  ],
  "id": "CVE-2026-46137",
  "lastModified": "2026-06-24T17:32:53.823",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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        },
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        "impactScore": 5.9,
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        "type": "Secondary"
      }
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  "published": "2026-05-28T10:16:29.263",
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      "tags": [
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  "vulnStatus": "Undergoing Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-362"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-46137 (GCVE-0-2026-46137)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:35 – Updated: 2026-08-05 12:29

Title

mptcp: pm: ADD_ADDR rtx: fix potential data-race

Summary

Severity

9.8 (Critical)


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

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/d9b272a85fe6b8f99…
https://git.kernel.org/stable/c/23079e0b7742ec114…
https://git.kernel.org/stable/c/b35605e1f1e877038…
https://git.kernel.org/stable/c/013dcdc1961543b9a…
https://git.kernel.org/stable/c/6e4710d7d8782cb61…
https://git.kernel.org/stable/c/2ad56e434199ca24a…
https://git.kernel.org/stable/c/cc3c0399361efaaf7…
https://git.kernel.org/stable/c/5cd6e0ad79d261526…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 00cfd77b9063dcdf3628a7087faba60de85a9cc8 , < d9b272a85fe6b8f993e37915311e4038c814a533 (git) Affected: 00cfd77b9063dcdf3628a7087faba60de85a9cc8 , < 23079e0b7742ec114d3507c3e3aad01b7b69e4af (git) Affected: 00cfd77b9063dcdf3628a7087faba60de85a9cc8 , < b35605e1f1e877038c8c9d499babbc891cdd234f (git) Affected: 00cfd77b9063dcdf3628a7087faba60de85a9cc8 , < 013dcdc1961543b9a3433466bc8c79a2f4ca75b5 (git) Affected: 00cfd77b9063dcdf3628a7087faba60de85a9cc8 , < 6e4710d7d8782cb61af29a7e7111ddfc38b9e1a3 (git) Affected: 00cfd77b9063dcdf3628a7087faba60de85a9cc8 , < 2ad56e434199ca24a812bb353667aa1c3860f513 (git) Affected: 00cfd77b9063dcdf3628a7087faba60de85a9cc8 , < cc3c0399361efaaf7ae64262eb3f70829b1189c6 (git) Affected: 00cfd77b9063dcdf3628a7087faba60de85a9cc8 , < 5cd6e0ad79d2615264f63929f8b457ad97ae550d (git)
Linux	Linux	Affected: 5.10 Unaffected: 0 , < 5.10 (semver) Unaffected: 5.10.259 , ≤ 5.10.* (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.141 , ≤ 6.6.* (semver) Unaffected: 6.12.91 , ≤ 6.12.* (semver) Unaffected: 6.18.30 , ≤ 6.18.* (semver) Unaffected: 7.0.7 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mptcp/pm.c"
          ],
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: pm: ADD_ADDR rtx: fix potential data-race\n\nThis mptcp_pm_add_timer() helper is executed as a timer callback in\nsoftirq context. To avoid any data races, the socket lock needs to be\nheld with bh_lock_sock().\n\nIf the socket is in use, retry again soon after, similar to what is done\nwith the keepalive timer."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The vulnerable timer is part of the MPTCP network stack (net/mptcp); it is kept firing by a remote peer withholding ADD_ADDR echoes, and the racing conn_list modifications are driven by remote MP_JOIN/RST traffic, so an unauthenticated remote peer can reach and trigger it over the network.\nAC:L - The remote attacker controls both sides of the race \u2014 it drives the ADD_ADDR retransmit timer (by not echoing) and the concurrent subflow add/remove (MP_JOIN and RST), and can repeat this across many subflows/connections to reliably hit the unlocked conn_list iteration.\nPR:N - Exploitation only requires being a remote MPTCP peer of a server that advertises addresses; no credentials or privileges on the target are needed.\nUI:N - No action by any local user is required; the attacker drives the entire condition via network protocol behavior.\nS:U - The corruption stays within the kernel\u0027s own security authority; no crossing of a VM/sandbox/IOMMU boundary.\nC:H - The softirq timer iterates conn_list and reads subflow/ssk fields concurrently with subflow free, a use-after-free read of freed (potentially reallocated) memory, which per kernel scoring gives high confidentiality impact.\nI:H - Racing list_for_each_entry against list_del plus subflow free is a use-after-free/list-corruption condition; once the freed object is reallocated it can be leveraged for memory-integrity compromise, scored high for UAF-class races.\nA:H - The list-traversal-vs-deletion race can follow poisoned/dangling list pointers or dereference a freed subflow, causing a kernel oops/panic."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:29:59.255Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d9b272a85fe6b8f993e37915311e4038c814a533"
        },
        {
          "url": "https://git.kernel.org/stable/c/23079e0b7742ec114d3507c3e3aad01b7b69e4af"
        },
        {
          "url": "https://git.kernel.org/stable/c/b35605e1f1e877038c8c9d499babbc891cdd234f"
        },
        {
          "url": "https://git.kernel.org/stable/c/013dcdc1961543b9a3433466bc8c79a2f4ca75b5"
        },
        {
          "url": "https://git.kernel.org/stable/c/6e4710d7d8782cb61af29a7e7111ddfc38b9e1a3"
        },
        {
          "url": "https://git.kernel.org/stable/c/2ad56e434199ca24a812bb353667aa1c3860f513"
        },
        {
          "url": "https://git.kernel.org/stable/c/cc3c0399361efaaf7ae64262eb3f70829b1189c6"
        },
        {
          "url": "https://git.kernel.org/stable/c/5cd6e0ad79d2615264f63929f8b457ad97ae550d"
        }
      ],
      "title": "mptcp: pm: ADD_ADDR rtx: fix potential data-race",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46137",
    "datePublished": "2026-05-28T09:35:53.628Z",
    "dateReserved": "2026-05-13T15:03:33.100Z",
    "dateUpdated": "2026-08-05T12:29:59.255Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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FKIE_CVE-2026-46137

CVE-2026-46137 (GCVE-0-2026-46137)

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