Vulnerability-Lookup

GHSA-R3F7-9RJ4-J5FM

Vulnerability from github – Published: 2026-02-14 18:30 – Updated: 2026-02-16 12:30

Details

In the Linux kernel, the following vulnerability has been resolved:

mptcp: fix race in mptcp_pm_nl_flush_addrs_doit()

syzbot and Eulgyu Kim reported crashes in mptcp_pm_nl_get_local_id() and/or mptcp_pm_nl_is_backup()

Root cause is list_splice_init() in mptcp_pm_nl_flush_addrs_doit() which is not RCU ready.

list_splice_init_rcu() can not be called here while holding pernet->lock spinlock.

Many thanks to Eulgyu Kim for providing a repro and testing our patches.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23169"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-14T16:15:57Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: fix race in mptcp_pm_nl_flush_addrs_doit()\n\nsyzbot and Eulgyu Kim reported crashes in mptcp_pm_nl_get_local_id()\nand/or mptcp_pm_nl_is_backup()\n\nRoot cause is list_splice_init() in mptcp_pm_nl_flush_addrs_doit()\nwhich is not RCU ready.\n\nlist_splice_init_rcu() can not be called here while holding pernet-\u003elock\nspinlock.\n\nMany thanks to Eulgyu Kim for providing a repro and testing our patches.",
  "id": "GHSA-r3f7-9rj4-j5fm",
  "modified": "2026-02-16T12:30:24Z",
  "published": "2026-02-14T18:30:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23169"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1f1b9523527df02685dde603f20ff6e603d8e4a1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/455e882192c9833f176f3fbbbb2f036b6c5bf555"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/51223bdd0f60b06cfc7f25885c4d4be917adba94"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e2a9eeb69f7d4ca4cf4c70463af77664fdb6ab1d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-23169 (GCVE-0-2026-23169)

Vulnerability from cvelistv5 – Published: 2026-02-14 16:01 – Updated: 2026-02-16 09:26

Title

mptcp: fix race in mptcp_pm_nl_flush_addrs_doit()

Summary

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix race in mptcp_pm_nl_flush_addrs_doit() syzbot and Eulgyu Kim reported crashes in mptcp_pm_nl_get_local_id() and/or mptcp_pm_nl_is_backup() Root cause is list_splice_init() in mptcp_pm_nl_flush_addrs_doit() which is not RCU ready. list_splice_init_rcu() can not be called here while holding pernet->lock spinlock. Many thanks to Eulgyu Kim for providing a repro and testing our patches.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/455e882192c9833f1…
	https://git.kernel.org/stable/c/51223bdd0f60b06cf…
	https://git.kernel.org/stable/c/1f1b9523527df0268…
	https://git.kernel.org/stable/c/e2a9eeb69f7d4ca4c…

Impacted products

Vendor

Product

Version

Linux

Affected: 141694df6573b49aa4143c92556544b4b0bbda72 , < 455e882192c9833f176f3fbbbb2f036b6c5bf555 (git)
Affected: 141694df6573b49aa4143c92556544b4b0bbda72 , < 51223bdd0f60b06cfc7f25885c4d4be917adba94 (git)
Affected: 141694df6573b49aa4143c92556544b4b0bbda72 , < 1f1b9523527df02685dde603f20ff6e603d8e4a1 (git)
Affected: 141694df6573b49aa4143c92556544b4b0bbda72 , < e2a9eeb69f7d4ca4cf4c70463af77664fdb6ab1d (git)

Linux

Affected: 5.11
Unaffected: 0 , < 5.11 (semver)
Unaffected: 6.6.125 , ≤ 6.6.* (semver)
Unaffected: 6.12.72 , ≤ 6.12.* (semver)
Unaffected: 6.18.9 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mptcp/pm_kernel.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "455e882192c9833f176f3fbbbb2f036b6c5bf555",
              "status": "affected",
              "version": "141694df6573b49aa4143c92556544b4b0bbda72",
              "versionType": "git"
            },
            {
              "lessThan": "51223bdd0f60b06cfc7f25885c4d4be917adba94",
              "status": "affected",
              "version": "141694df6573b49aa4143c92556544b4b0bbda72",
              "versionType": "git"
            },
            {
              "lessThan": "1f1b9523527df02685dde603f20ff6e603d8e4a1",
              "status": "affected",
              "version": "141694df6573b49aa4143c92556544b4b0bbda72",
              "versionType": "git"
            },
            {
              "lessThan": "e2a9eeb69f7d4ca4cf4c70463af77664fdb6ab1d",
              "status": "affected",
              "version": "141694df6573b49aa4143c92556544b4b0bbda72",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/mptcp/pm_kernel.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.11"
            },
            {
              "lessThan": "5.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.125",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.72",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.125",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.72",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
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          ]
        }
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: fix race in mptcp_pm_nl_flush_addrs_doit()\n\nsyzbot and Eulgyu Kim reported crashes in mptcp_pm_nl_get_local_id()\nand/or mptcp_pm_nl_is_backup()\n\nRoot cause is list_splice_init() in mptcp_pm_nl_flush_addrs_doit()\nwhich is not RCU ready.\n\nlist_splice_init_rcu() can not be called here while holding pernet-\u003elock\nspinlock.\n\nMany thanks to Eulgyu Kim for providing a repro and testing our patches."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-16T09:26:08.410Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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        {
          "url": "https://git.kernel.org/stable/c/e2a9eeb69f7d4ca4cf4c70463af77664fdb6ab1d"
        }
      ],
      "title": "mptcp: fix race in mptcp_pm_nl_flush_addrs_doit()",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23169",
    "datePublished": "2026-02-14T16:01:32.139Z",
    "dateReserved": "2026-01-13T15:37:45.982Z",
    "dateUpdated": "2026-02-16T09:26:08.410Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-R3F7-9RJ4-J5FM

CVE-2026-23169 (GCVE-0-2026-23169)

Tags

Sightings

Nomenclature