Vulnerability-Lookup

CVE-2026-74708 (GCVE-0-2026-74708)

Vulnerability from cvelistv5 – Published: 2026-08-22 15:33 – Updated: 2026-08-22 15:33

Title

xsk: validate launch-time metadata size

Summary

In the Linux kernel, the following vulnerability has been resolved: xsk: validate launch-time metadata size Launch-time metadata extends beyond the first 16 bytes of struct xsk_tx_metadata. Reject the request when the registered metadata area does not contain the complete field. Snapshot the validated flags for the generic transmit path and use that snapshot for request and completion processing, avoiding inconsistent decisions if user space changes the flags concurrently. Note that only xsk_skb_metadata is properly using the flags, __xsk_buff_get_metadata ignores them. Next commits address that.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/af511afa1d2977f38…
https://git.kernel.org/stable/c/bc63d47611c07b0d5…
https://git.kernel.org/stable/c/439ce2dddf3d22129…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 , < af511afa1d2977f384044df78d6fbf9fba653f7a (git) Affected: ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 , < bc63d47611c07b0d5d655fe1a590861931527920 (git) Affected: ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 , < 439ce2dddf3d22129b9113a7881637256a35e936 (git) Affected: d9d736c416c9a85f84e15435ba82a177262e745b (git) Affected: 6.14.2 , < 6.15 (semver)	guessed
Linux	Linux	Affected: 6.15 Unaffected: 0 , < 6.15 (semver) Unaffected: 6.18.45 , ≤ 6.18.* (semver) Unaffected: 7.1.9 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/net/xdp_sock_drv.h",
            "net/xdp/xsk.c"
          ],
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          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "af511afa1d2977f384044df78d6fbf9fba653f7a",
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              "version": "ca4419f15abd19ba8be1e109661b60f9f5b6c9f0",
              "versionType": "git"
            },
            {
              "lessThan": "bc63d47611c07b0d5d655fe1a590861931527920",
              "status": "affected",
              "version": "ca4419f15abd19ba8be1e109661b60f9f5b6c9f0",
              "versionType": "git"
            },
            {
              "lessThan": "439ce2dddf3d22129b9113a7881637256a35e936",
              "status": "affected",
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              "versionType": "git"
            },
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              "versionType": "git"
            },
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              "status": "affected",
              "version": "6.14.2",
              "versionType": "semver"
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          "product": "Linux",
          "programFiles": [
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            "net/xdp/xsk.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
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              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "versionEndExcluding": "6.18.45",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.9",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.14.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: validate launch-time metadata size\n\nLaunch-time metadata extends beyond the first 16 bytes of struct\nxsk_tx_metadata. Reject the request when the registered metadata area does\nnot contain the complete field.\n\nSnapshot the validated flags for the generic transmit path and use that\nsnapshot for request and completion processing, avoiding inconsistent\ndecisions if user space changes the flags concurrently.\n\nNote that only xsk_skb_metadata is properly using the flags,\n__xsk_buff_get_metadata ignores them. Next commits address that."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-22T15:33:05.956Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/af511afa1d2977f384044df78d6fbf9fba653f7a"
        },
        {
          "url": "https://git.kernel.org/stable/c/bc63d47611c07b0d5d655fe1a590861931527920"
        },
        {
          "url": "https://git.kernel.org/stable/c/439ce2dddf3d22129b9113a7881637256a35e936"
        }
      ],
      "title": "xsk: validate launch-time metadata size",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74708",
    "datePublished": "2026-08-22T15:33:05.956Z",
    "dateReserved": "2026-08-15T05:44:03.927Z",
    "dateUpdated": "2026-08-22T15:33:05.956Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
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  }
}

FKIE_CVE-2026-74708

Vulnerability from fkie_nvd - Published: 2026-08-22 16:16 - Updated: 2026-08-22 16:16

Severity

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/439ce2dddf3d22129b9113a7881637256a35e936
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/af511afa1d2977f384044df78d6fbf9fba653f7a
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bc63d47611c07b0d5d655fe1a590861931527920

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/net/xdp_sock_drv.h",
            "net/xdp/xsk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "af511afa1d2977f384044df78d6fbf9fba653f7a",
              "status": "affected",
              "version": "ca4419f15abd19ba8be1e109661b60f9f5b6c9f0",
              "versionType": "git"
            },
            {
              "lessThan": "bc63d47611c07b0d5d655fe1a590861931527920",
              "status": "affected",
              "version": "ca4419f15abd19ba8be1e109661b60f9f5b6c9f0",
              "versionType": "git"
            },
            {
              "lessThan": "439ce2dddf3d22129b9113a7881637256a35e936",
              "status": "affected",
              "version": "ca4419f15abd19ba8be1e109661b60f9f5b6c9f0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d9d736c416c9a85f84e15435ba82a177262e745b",
              "versionType": "git"
            },
            {
              "lessThan": "6.15",
              "status": "affected",
              "version": "6.14.2",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/net/xdp_sock_drv.h",
            "net/xdp/xsk.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": "6.18.*",
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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\nxsk: validate launch-time metadata size\n\nLaunch-time metadata extends beyond the first 16 bytes of struct\nxsk_tx_metadata. Reject the request when the registered metadata area does\nnot contain the complete field.\n\nSnapshot the validated flags for the generic transmit path and use that\nsnapshot for request and completion processing, avoiding inconsistent\ndecisions if user space changes the flags concurrently.\n\nNote that only xsk_skb_metadata is properly using the flags,\n__xsk_buff_get_metadata ignores them. Next commits address that."
    }
  ],
  "id": "CVE-2026-74708",
  "lastModified": "2026-08-22T16:16:45.540",
  "metrics": {},
  "published": "2026-08-22T16:16:45.540",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/439ce2dddf3d22129b9113a7881637256a35e936"
    },
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    },
    {
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      "url": "https://git.kernel.org/stable/c/bc63d47611c07b0d5d655fe1a590861931527920"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-QVQ6-8JQJ-Q3P2

Vulnerability from github – Published: 2026-08-22 18:30 – Updated: 2026-08-22 18:30

Details

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

xsk: validate launch-time metadata size

Launch-time metadata extends beyond the first 16 bytes of struct xsk_tx_metadata. Reject the request when the registered metadata area does not contain the complete field.

Snapshot the validated flags for the generic transmit path and use that snapshot for request and completion processing, avoiding inconsistent decisions if user space changes the flags concurrently.

Note that only xsk_skb_metadata is properly using the flags, __xsk_buff_get_metadata ignores them. Next commits address that.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-74708"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-22T16:16:45Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: validate launch-time metadata size\n\nLaunch-time metadata extends beyond the first 16 bytes of struct\nxsk_tx_metadata. Reject the request when the registered metadata area does\nnot contain the complete field.\n\nSnapshot the validated flags for the generic transmit path and use that\nsnapshot for request and completion processing, avoiding inconsistent\ndecisions if user space changes the flags concurrently.\n\nNote that only xsk_skb_metadata is properly using the flags,\n__xsk_buff_get_metadata ignores them. Next commits address that.",
  "id": "GHSA-qvq6-8jqj-q3p2",
  "modified": "2026-08-22T18:30:29Z",
  "published": "2026-08-22T18:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74708"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/439ce2dddf3d22129b9113a7881637256a35e936"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/af511afa1d2977f384044df78d6fbf9fba653f7a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bc63d47611c07b0d5d655fe1a590861931527920"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-74708 (GCVE-0-2026-74708)

FKIE_CVE-2026-74708

GHSA-QVQ6-8JQJ-Q3P2

Tags

Sightings

Nomenclature