Vulnerability-Lookup

GHSA-JC98-98JJ-62CP

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:

vsock: fix buffer size clamping order

In vsock_update_buffer_size(), the buffer size was being clamped to the maximum first, and then to the minimum. If a user sets a minimum buffer size larger than the maximum, the minimum check overrides the maximum check, inverting the constraint.

This breaks the intended socket memory boundaries by allowing the vsk->buffer_size to grow beyond the configured vsk->buffer_max_size.

Fix this by checking the minimum first, and then the maximum. This ensures the buffer size never exceeds the buffer_max_size.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46234"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-28T10:16:39Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock: fix buffer size clamping order\n\nIn vsock_update_buffer_size(), the buffer size was being clamped to the\nmaximum first, and then to the minimum. If a user sets a minimum buffer\nsize larger than the maximum, the minimum check overrides the maximum\ncheck, inverting the constraint.\n\nThis breaks the intended socket memory boundaries by allowing the\nvsk-\u003ebuffer_size to grow beyond the configured vsk-\u003ebuffer_max_size.\n\nFix this by checking the minimum first, and then the maximum. This\nensures the buffer size never exceeds the buffer_max_size.",
  "id": "GHSA-jc98-98jj-62cp",
  "modified": "2026-05-28T12:30:34Z",
  "published": "2026-05-28T12:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46234"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0b68881501460c3761f196469e1e503218c5e536"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2602f7bb5818e92315feeaeb71d8ce4d5c9ab160"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/310da27932dd0afe7ce7456dfe1f0814c3301f41"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a998a7e250bf976539e05a00ec64a81292afecaa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d114bfdc9b76bf93b881e195b7ec957c14227bab"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-46234 (GCVE-0-2026-46234)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:40 – Updated: 2026-05-28 09:40

Title

vsock: fix buffer size clamping order

Summary

In the Linux kernel, the following vulnerability has been resolved: vsock: fix buffer size clamping order In vsock_update_buffer_size(), the buffer size was being clamped to the maximum first, and then to the minimum. If a user sets a minimum buffer size larger than the maximum, the minimum check overrides the maximum check, inverting the constraint. This breaks the intended socket memory boundaries by allowing the vsk->buffer_size to grow beyond the configured vsk->buffer_max_size. Fix this by checking the minimum first, and then the maximum. This ensures the buffer size never exceeds the buffer_max_size.

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/a998a7e250bf97653…
https://git.kernel.org/stable/c/310da27932dd0afe7…
https://git.kernel.org/stable/c/2602f7bb5818e9231…
https://git.kernel.org/stable/c/0b68881501460c376…
https://git.kernel.org/stable/c/d114bfdc9b76bf93b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 , < a998a7e250bf976539e05a00ec64a81292afecaa (git) Affected: b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 , < 310da27932dd0afe7ce7456dfe1f0814c3301f41 (git) Affected: b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 , < 2602f7bb5818e92315feeaeb71d8ce4d5c9ab160 (git) Affected: b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 , < 0b68881501460c3761f196469e1e503218c5e536 (git) Affected: b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 , < d114bfdc9b76bf93b881e195b7ec957c14227bab (git)
Linux	Linux	Affected: 5.5 Unaffected: 0 , < 5.5 (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.90 , ≤ 6.12.* (semver) Unaffected: 6.18.32 , ≤ 6.18.* (semver) Unaffected: 7.0.9 , ≤ 7.0.* (semver) Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "net/vmw_vsock/af_vsock.c"
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          ]
        },
        {
          "defaultStatus": "affected",
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              "version": "5.5"
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              "version": "0",
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              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.12.90",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.32",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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    "datePublished": "2026-05-28T09:40:58.373Z",
    "dateReserved": "2026-05-13T15:03:33.106Z",
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}

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-JC98-98JJ-62CP

CVE-2026-46234 (GCVE-0-2026-46234)

Tags

Sightings

Nomenclature