FKIE_CVE-2025-40291

Vulnerability from fkie_nvd - Published: 2025-12-08 01:16 - Updated: 2026-06-17 09:21
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/146eb58629f45f8297e83d69e64d4eea4b28d972
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/826ce37a842633efe1bb763e4b13045d74060d72
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "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"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2025-40291",
  "lastModified": "2026-06-17T09:21:36.367",
  "metrics": {},
  "published": "2025-12-08T01:16:01.040",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/146eb58629f45f8297e83d69e64d4eea4b28d972"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/826ce37a842633efe1bb763e4b13045d74060d72"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}


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