github - ghsa-hcjg-xhvj-4968

GHSA-HCJG-XHVJ-4968

Vulnerability from github – Published: 2025-12-08 03:31 – Updated: 2025-12-08 03:31

Details

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

io_uring: fix regbuf vector size truncation

There is a report of io_estimate_bvec_size() truncating the calculated number of segments that leads to corruption issues. Check it doesn't overflow "int"s used later. Rough but simple, can be improved on top.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40291"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-08T01:16:01Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: fix regbuf vector size truncation\n\nThere is a report of io_estimate_bvec_size() truncating the calculated\nnumber of segments that leads to corruption issues. Check it doesn\u0027t\noverflow \"int\"s used later. Rough but simple, can be improved on top.",
  "id": "GHSA-hcjg-xhvj-4968",
  "modified": "2025-12-08T03:31:00Z",
  "published": "2025-12-08T03:31:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40291"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/146eb58629f45f8297e83d69e64d4eea4b28d972"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/826ce37a842633efe1bb763e4b13045d74060d72"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-40291 (GCVE-0-2025-40291)

Vulnerability from cvelistv5 – Published: 2025-12-08 00:46 – Updated: 2025-12-08 00:46

Title

io_uring: fix regbuf vector size truncation

Summary

In the Linux kernel, the following vulnerability has been resolved: io_uring: fix regbuf vector size truncation There is a report of io_estimate_bvec_size() truncating the calculated number of segments that leads to corruption issues. Check it doesn't overflow "int"s used later. Rough but simple, can be improved on top.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/826ce37a842633efe…
	https://git.kernel.org/stable/c/146eb58629f45f829…

Impacted products

Vendor

Product

Version

Linux

Affected: 9ef4cbbcb4ac3786a1a4164507511b76b2a572c5 , < 826ce37a842633efe1bb763e4b13045d74060d72 (git)
Affected: 9ef4cbbcb4ac3786a1a4164507511b76b2a572c5 , < 146eb58629f45f8297e83d69e64d4eea4b28d972 (git)

Linux

Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.17.8 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "io_uring/rsrc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "826ce37a842633efe1bb763e4b13045d74060d72",
              "status": "affected",
              "version": "9ef4cbbcb4ac3786a1a4164507511b76b2a572c5",
              "versionType": "git"
            },
            {
              "lessThan": "146eb58629f45f8297e83d69e64d4eea4b28d972",
              "status": "affected",
              "version": "9ef4cbbcb4ac3786a1a4164507511b76b2a572c5",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "io_uring/rsrc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.8",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: fix regbuf vector size truncation\n\nThere is a report of io_estimate_bvec_size() truncating the calculated\nnumber of segments that leads to corruption issues. Check it doesn\u0027t\noverflow \"int\"s used later. Rough but simple, can be improved on top."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-08T00:46:14.601Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/826ce37a842633efe1bb763e4b13045d74060d72"
        },
        {
          "url": "https://git.kernel.org/stable/c/146eb58629f45f8297e83d69e64d4eea4b28d972"
        }
      ],
      "title": "io_uring: fix regbuf vector size truncation",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40291",
    "datePublished": "2025-12-08T00:46:14.601Z",
    "dateReserved": "2025-04-16T07:20:57.185Z",
    "dateUpdated": "2025-12-08T00:46:14.601Z",
    "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-HCJG-XHVJ-4968

CVE-2025-40291 (GCVE-0-2025-40291)

Tags

Sightings

Nomenclature