github - ghsa-wh23-v966-32jj

GHSA-WH23-V966-32JJ

Vulnerability from github – Published: 2025-03-07 09:30 – Updated: 2025-10-29 21:30

Details

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

io_uring/kbuf: reallocate buf lists on upgrade

IORING_REGISTER_PBUF_RING can reuse an old struct io_buffer_list if it was created for legacy selected buffer and has been emptied. It violates the requirement that most of the field should stay stable after publish. Always reallocate it instead.

Severity ?

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-21836"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-03-07T09:15:16Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/kbuf: reallocate buf lists on upgrade\n\nIORING_REGISTER_PBUF_RING can reuse an old struct io_buffer_list if it\nwas created for legacy selected buffer and has been emptied. It violates\nthe requirement that most of the field should stay stable after publish.\nAlways reallocate it instead.",
  "id": "GHSA-wh23-v966-32jj",
  "modified": "2025-10-29T21:30:32Z",
  "published": "2025-03-07T09:30:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21836"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/146a185f6c05ee263db715f860620606303c4633"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2a5febbef40ce968e295a7aeaa5d5cbd9e3e5ad4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7d0dc28dae836caf7645fef62a10befc624dd17b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8802766324e1f5d414a81ac43365c20142e85603"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-21836 (GCVE-0-2025-21836)

Vulnerability from cvelistv5 – Published: 2025-03-07 09:09 – Updated: 2025-05-04 07:22

Summary

In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: reallocate buf lists on upgrade IORING_REGISTER_PBUF_RING can reuse an old struct io_buffer_list if it was created for legacy selected buffer and has been emptied. It violates the requirement that most of the field should stay stable after publish. Always reallocate it instead.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/146a185f6c05ee263…
	https://git.kernel.org/stable/c/7d0dc28dae836caf7…
	https://git.kernel.org/stable/c/2a5febbef40ce968e…
	https://git.kernel.org/stable/c/8802766324e1f5d41…

Impacted products

Vendor

Product

Version

Linux

Affected: 2fcabce2d7d34f69a888146dab15b36a917f09d4 , < 146a185f6c05ee263db715f860620606303c4633 (git)
Affected: 2fcabce2d7d34f69a888146dab15b36a917f09d4 , < 7d0dc28dae836caf7645fef62a10befc624dd17b (git)
Affected: 2fcabce2d7d34f69a888146dab15b36a917f09d4 , < 2a5febbef40ce968e295a7aeaa5d5cbd9e3e5ad4 (git)
Affected: 2fcabce2d7d34f69a888146dab15b36a917f09d4 , < 8802766324e1f5d414a81ac43365c20142e85603 (git)

Linux

Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.6.79 , ≤ 6.6.* (semver)
Unaffected: 6.12.16 , ≤ 6.12.* (semver)
Unaffected: 6.13.4 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "io_uring/kbuf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "146a185f6c05ee263db715f860620606303c4633",
              "status": "affected",
              "version": "2fcabce2d7d34f69a888146dab15b36a917f09d4",
              "versionType": "git"
            },
            {
              "lessThan": "7d0dc28dae836caf7645fef62a10befc624dd17b",
              "status": "affected",
              "version": "2fcabce2d7d34f69a888146dab15b36a917f09d4",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "2fcabce2d7d34f69a888146dab15b36a917f09d4",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "2fcabce2d7d34f69a888146dab15b36a917f09d4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "io_uring/kbuf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.19"
            },
            {
              "lessThan": "5.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.79",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
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                  "vulnerable": true
                }
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              "negate": false,
              "operator": "OR"
            }
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:22:09.559Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/2a5febbef40ce968e295a7aeaa5d5cbd9e3e5ad4"
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        {
          "url": "https://git.kernel.org/stable/c/8802766324e1f5d414a81ac43365c20142e85603"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21836",
    "datePublished": "2025-03-07T09:09:56.127Z",
    "dateReserved": "2024-12-29T08:45:45.777Z",
    "dateUpdated": "2025-05-04T07:22:09.559Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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-WH23-V966-32JJ

CVE-2025-21836 (GCVE-0-2025-21836)

Tags

Sightings

Nomenclature