fkie_nvd - fkie_cve-2025-40046

fkie_cve-2025-40046

Vulnerability from fkie_nvd

Published

2025-10-28 12:15

Modified

2025-10-30 15:05

Severity ?

Summary

In the Linux kernel, the following vulnerability has been resolved: io_uring/zcrx: fix overshooting recv limit It's reported that sometimes a zcrx request can receive more than was requested. It's caused by io_zcrx_recv_skb() adjusting desc->count for all received buffers including frag lists, but then doing recursive calls to process frag list skbs, which leads to desc->count double accounting and underflow.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/09cfd3c52ea76f43b3cb15e570aeddf633d65e80
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8bcc9eaf1b19f1a7029cba19f6bd4122b40f6c4f

Impacted products

	Vendor	Product	Version

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/zcrx: fix overshooting recv limit\n\nIt\u0027s reported that sometimes a zcrx request can receive more than was\nrequested. It\u0027s caused by io_zcrx_recv_skb() adjusting desc-\u003ecount for\nall received buffers including frag lists, but then doing recursive\ncalls to process frag list skbs, which leads to desc-\u003ecount double\naccounting and underflow."
    }
  ],
  "id": "CVE-2025-40046",
  "lastModified": "2025-10-30T15:05:32.197",
  "metrics": {},
  "published": "2025-10-28T12:15:38.687",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/09cfd3c52ea76f43b3cb15e570aeddf633d65e80"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8bcc9eaf1b19f1a7029cba19f6bd4122b40f6c4f"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

CVE-2025-40046 (GCVE-0-2025-40046)

Vulnerability from cvelistv5

Published

2025-10-28 11:48

Modified

2025-10-28 11:48

Severity ?

Summary

In the Linux kernel, the following vulnerability has been resolved: io_uring/zcrx: fix overshooting recv limit It's reported that sometimes a zcrx request can receive more than was requested. It's caused by io_zcrx_recv_skb() adjusting desc->count for all received buffers including frag lists, but then doing recursive calls to process frag list skbs, which leads to desc->count double accounting and underflow.

References

URL

Tags

	https://git.kernel.org/stable/c/8bcc9eaf1b19f1a7029cba19f6bd4122b40f6c4f
	https://git.kernel.org/stable/c/09cfd3c52ea76f43b3cb15e570aeddf633d65e80

Impacted products

Vendor

Product

Version

Version: 6699ec9a23f85f1764183430209c741847c45f12
Version: 6699ec9a23f85f1764183430209c741847c45f12

Version: 6.15

Show details on NVD website

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "io_uring/zcrx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8bcc9eaf1b19f1a7029cba19f6bd4122b40f6c4f",
              "status": "affected",
              "version": "6699ec9a23f85f1764183430209c741847c45f12",
              "versionType": "git"
            },
            {
              "lessThan": "09cfd3c52ea76f43b3cb15e570aeddf633d65e80",
              "status": "affected",
              "version": "6699ec9a23f85f1764183430209c741847c45f12",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "io_uring/zcrx.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": "6.17.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.3",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18-rc1",
                  "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/zcrx: fix overshooting recv limit\n\nIt\u0027s reported that sometimes a zcrx request can receive more than was\nrequested. It\u0027s caused by io_zcrx_recv_skb() adjusting desc-\u003ecount for\nall received buffers including frag lists, but then doing recursive\ncalls to process frag list skbs, which leads to desc-\u003ecount double\naccounting and underflow."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-28T11:48:24.022Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8bcc9eaf1b19f1a7029cba19f6bd4122b40f6c4f"
        },
        {
          "url": "https://git.kernel.org/stable/c/09cfd3c52ea76f43b3cb15e570aeddf633d65e80"
        }
      ],
      "title": "io_uring/zcrx: fix overshooting recv limit",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40046",
    "datePublished": "2025-10-28T11:48:24.022Z",
    "dateReserved": "2025-04-16T07:20:57.154Z",
    "dateUpdated": "2025-10-28T11:48:24.022Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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