Vulnerability-Lookup

GHSA-78R5-M85F-Q5M9

Vulnerability from github – Published: 2026-05-28 12:30 – Updated: 2026-05-28 12:30

Details

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

mptcp: fix scheduling with atomic in timestamp sockopt

Using lock_sock_fast() (atomic context) around sock_set_timestamp() and sock_set_timestamping() is unsafe, as both helpers can sleep.

Replace lock_sock_fast() with sleepable lock_sock()/release_sock() to avoid scheduling while atomic panic.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46168"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-28T10:16:32Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: fix scheduling with atomic in timestamp sockopt\n\nUsing lock_sock_fast() (atomic context) around sock_set_timestamp()\nand sock_set_timestamping() is unsafe, as both helpers can sleep.\n\nReplace lock_sock_fast() with sleepable lock_sock()/release_sock()\nto avoid scheduling while atomic panic.",
  "id": "GHSA-78r5-m85f-q5m9",
  "modified": "2026-05-28T12:30:31Z",
  "published": "2026-05-28T12:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46168"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7eb513b42721bee4b96da69f6188d5a7783f210d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8a005fe451c73fd2b3d1faa5643c11e6bd07acfc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b157dab93a7af44a84e78cf0cb311dde475cff5b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b5c52908d52c6c8eb8933264aa6087a0600fd892"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ebeb70e29e37cfce899309cc2665a3bfe960ed94"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-46168 (GCVE-0-2026-46168)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-05-28 09:36

Title

mptcp: fix scheduling with atomic in timestamp sockopt

Summary

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix scheduling with atomic in timestamp sockopt Using lock_sock_fast() (atomic context) around sock_set_timestamp() and sock_set_timestamping() is unsafe, as both helpers can sleep. Replace lock_sock_fast() with sleepable lock_sock()/release_sock() to avoid scheduling while atomic panic.

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/ebeb70e29e37cfce8…
https://git.kernel.org/stable/c/b157dab93a7af44a8…
https://git.kernel.org/stable/c/8a005fe451c73fd2b…
https://git.kernel.org/stable/c/7eb513b42721bee4b…
https://git.kernel.org/stable/c/b5c52908d52c6c8eb…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 9061f24bf82ec2e92dd1e7c10b98b680db023d31 , < ebeb70e29e37cfce899309cc2665a3bfe960ed94 (git) Affected: 9061f24bf82ec2e92dd1e7c10b98b680db023d31 , < b157dab93a7af44a84e78cf0cb311dde475cff5b (git) Affected: 9061f24bf82ec2e92dd1e7c10b98b680db023d31 , < 8a005fe451c73fd2b3d1faa5643c11e6bd07acfc (git) Affected: 9061f24bf82ec2e92dd1e7c10b98b680db023d31 , < 7eb513b42721bee4b96da69f6188d5a7783f210d (git) Affected: 9061f24bf82ec2e92dd1e7c10b98b680db023d31 , < b5c52908d52c6c8eb8933264aa6087a0600fd892 (git)
Linux	Linux	Affected: 5.14 Unaffected: 0 , < 5.14 (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.88 , ≤ 6.12.* (semver) Unaffected: 6.18.30 , ≤ 6.18.* (semver) Unaffected: 7.0.7 , ≤ 7.0.* (semver) Unaffected: 7.1-rc2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mptcp/sockopt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "9061f24bf82ec2e92dd1e7c10b98b680db023d31",
              "versionType": "git"
            },
            {
              "lessThan": "b157dab93a7af44a84e78cf0cb311dde475cff5b",
              "status": "affected",
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            },
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            }
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        },
        {
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "5.14"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.88",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.30",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1-rc2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
                {
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      "providerMetadata": {
        "dateUpdated": "2026-05-28T09:36:23.394Z",
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        {
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      ],
      "title": "mptcp: fix scheduling with atomic in timestamp sockopt",
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    "cveId": "CVE-2026-46168",
    "datePublished": "2026-05-28T09:36:23.394Z",
    "dateReserved": "2026-05-13T15:03:33.102Z",
    "dateUpdated": "2026-05-28T09:36:23.394Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

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.

Action not permitted

GHSA-78R5-M85F-Q5M9

CVE-2026-46168 (GCVE-0-2026-46168)

Tags

Sightings

Nomenclature