Vulnerability-Lookup

CVE-2026-74709 (GCVE-0-2026-74709)

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

Title

xsk: clear metadata pointer when no timestamp is requested

Summary

In the Linux kernel, the following vulnerability has been resolved: xsk: clear metadata pointer when no timestamp is requested User space can change metadata flags after request processing. Rereading them during completion can therefore make the kernel write a timestamp that was not requested when the packet was submitted. Clear the metadata pointer during request processing unless timestamp completion is requested. Completion handling can then use the pointer itself instead of rereading the flags. On the mlx5 multi-packet WQE path metadata is evaluated per batch: xsk_tx_metadata_request() runs only for the descriptor that starts a session, just like the checksum offload that is applied once through the shared WQE. Only that descriptor's pointer is reset, so completion handling can record a timestamp for the other descriptors of the session regardless of their own XDP_TXMD_FLAGS_TIMESTAMP bit. The write stays inside the metadata area; the single-WQE, other zero-copy, and generic paths reset the pointer per descriptor and are unaffected.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/0ba2e1eb07a826d02…
https://git.kernel.org/stable/c/eb4c613d4ebc3f664…
https://git.kernel.org/stable/c/9f60a67df8d3c8625…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 , < 0ba2e1eb07a826d021344e2f146b6716c58139eb (git) Affected: ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 , < eb4c613d4ebc3f664e70d572b8867ba114a8754e (git) Affected: ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 , < 9f60a67df8d3c862503bee62bada8e7089cba438 (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.h",
            "net/xdp/xsk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0ba2e1eb07a826d021344e2f146b6716c58139eb",
              "status": "affected",
              "version": "ca4419f15abd19ba8be1e109661b60f9f5b6c9f0",
              "versionType": "git"
            },
            {
              "lessThan": "eb4c613d4ebc3f664e70d572b8867ba114a8754e",
              "status": "affected",
              "version": "ca4419f15abd19ba8be1e109661b60f9f5b6c9f0",
              "versionType": "git"
            },
            {
              "lessThan": "9f60a67df8d3c862503bee62bada8e7089cba438",
              "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.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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "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: clear metadata pointer when no timestamp is requested\n\nUser space can change metadata flags after request processing. Rereading\nthem during completion can therefore make the kernel write a timestamp\nthat was not requested when the packet was submitted.\n\nClear the metadata pointer during request processing unless timestamp\ncompletion is requested. Completion handling can then use the pointer\nitself instead of rereading the flags.\n\nOn the mlx5 multi-packet WQE path metadata is evaluated per batch:\nxsk_tx_metadata_request() runs only for the descriptor that starts a\nsession, just like the checksum offload that is applied once through the\nshared WQE. Only that descriptor\u0027s pointer is reset, so completion\nhandling can record a timestamp for the other descriptors of the session\nregardless of their own XDP_TXMD_FLAGS_TIMESTAMP bit. The write stays\ninside the metadata area; the single-WQE, other zero-copy, and generic\npaths reset the pointer per descriptor and are unaffected."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-22T15:33:06.558Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0ba2e1eb07a826d021344e2f146b6716c58139eb"
        },
        {
          "url": "https://git.kernel.org/stable/c/eb4c613d4ebc3f664e70d572b8867ba114a8754e"
        },
        {
          "url": "https://git.kernel.org/stable/c/9f60a67df8d3c862503bee62bada8e7089cba438"
        }
      ],
      "title": "xsk: clear metadata pointer when no timestamp is requested",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74709",
    "datePublished": "2026-08-22T15:33:06.558Z",
    "dateReserved": "2026-08-15T05:44:03.927Z",
    "dateUpdated": "2026-08-22T15:33:06.558Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-74709\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-22T16:16:45.640\",\"lastModified\":\"2026-08-22T16:16:45.640\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nxsk: clear metadata pointer when no timestamp is requested\\n\\nUser space can change metadata flags after request processing. Rereading\\nthem during completion can therefore make the kernel write a timestamp\\nthat was not requested when the packet was submitted.\\n\\nClear the metadata pointer during request processing unless timestamp\\ncompletion is requested. Completion handling can then use the pointer\\nitself instead of rereading the flags.\\n\\nOn the mlx5 multi-packet WQE path metadata is evaluated per batch:\\nxsk_tx_metadata_request() runs only for the descriptor that starts a\\nsession, just like the checksum offload that is applied once through the\\nshared WQE. Only that descriptor\u0027s pointer is reset, so completion\\nhandling can record a timestamp for the other descriptors of the session\\nregardless of their own XDP_TXMD_FLAGS_TIMESTAMP bit. The write stays\\ninside the metadata area; the single-WQE, other zero-copy, and generic\\npaths reset the pointer per descriptor and are unaffected.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"include/net/xdp_sock.h\",\"net/xdp/xsk.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"ca4419f15abd19ba8be1e109661b60f9f5b6c9f0\",\"lessThan\":\"0ba2e1eb07a826d021344e2f146b6716c58139eb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ca4419f15abd19ba8be1e109661b60f9f5b6c9f0\",\"lessThan\":\"eb4c613d4ebc3f664e70d572b8867ba114a8754e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ca4419f15abd19ba8be1e109661b60f9f5b6c9f0\",\"lessThan\":\"9f60a67df8d3c862503bee62bada8e7089cba438\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d9d736c416c9a85f84e15435ba82a177262e745b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6.14.2\",\"lessThan\":\"6.15\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"include/net/xdp_sock.h\",\"net/xdp/xsk.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.15\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.15\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.45\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.9\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0ba2e1eb07a826d021344e2f146b6716c58139eb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9f60a67df8d3c862503bee62bada8e7089cba438\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/eb4c613d4ebc3f664e70d572b8867ba114a8754e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

FKIE_CVE-2026-74709

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/0ba2e1eb07a826d021344e2f146b6716c58139eb
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9f60a67df8d3c862503bee62bada8e7089cba438
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/eb4c613d4ebc3f664e70d572b8867ba114a8754e

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/net/xdp_sock.h",
            "net/xdp/xsk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0ba2e1eb07a826d021344e2f146b6716c58139eb",
              "status": "affected",
              "version": "ca4419f15abd19ba8be1e109661b60f9f5b6c9f0",
              "versionType": "git"
            },
            {
              "lessThan": "eb4c613d4ebc3f664e70d572b8867ba114a8754e",
              "status": "affected",
              "version": "ca4419f15abd19ba8be1e109661b60f9f5b6c9f0",
              "versionType": "git"
            },
            {
              "lessThan": "9f60a67df8d3c862503bee62bada8e7089cba438",
              "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.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: clear metadata pointer when no timestamp is requested\n\nUser space can change metadata flags after request processing. Rereading\nthem during completion can therefore make the kernel write a timestamp\nthat was not requested when the packet was submitted.\n\nClear the metadata pointer during request processing unless timestamp\ncompletion is requested. Completion handling can then use the pointer\nitself instead of rereading the flags.\n\nOn the mlx5 multi-packet WQE path metadata is evaluated per batch:\nxsk_tx_metadata_request() runs only for the descriptor that starts a\nsession, just like the checksum offload that is applied once through the\nshared WQE. Only that descriptor\u0027s pointer is reset, so completion\nhandling can record a timestamp for the other descriptors of the session\nregardless of their own XDP_TXMD_FLAGS_TIMESTAMP bit. The write stays\ninside the metadata area; the single-WQE, other zero-copy, and generic\npaths reset the pointer per descriptor and are unaffected."
    }
  ],
  "id": "CVE-2026-74709",
  "lastModified": "2026-08-22T16:16:45.640",
  "metrics": {},
  "published": "2026-08-22T16:16:45.640",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0ba2e1eb07a826d021344e2f146b6716c58139eb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9f60a67df8d3c862503bee62bada8e7089cba438"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/eb4c613d4ebc3f664e70d572b8867ba114a8754e"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-GG32-FQWC-P469

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: clear metadata pointer when no timestamp is requested

User space can change metadata flags after request processing. Rereading them during completion can therefore make the kernel write a timestamp that was not requested when the packet was submitted.

Clear the metadata pointer during request processing unless timestamp completion is requested. Completion handling can then use the pointer itself instead of rereading the flags.

On the mlx5 multi-packet WQE path metadata is evaluated per batch: xsk_tx_metadata_request() runs only for the descriptor that starts a session, just like the checksum offload that is applied once through the shared WQE. Only that descriptor's pointer is reset, so completion handling can record a timestamp for the other descriptors of the session regardless of their own XDP_TXMD_FLAGS_TIMESTAMP bit. The write stays inside the metadata area; the single-WQE, other zero-copy, and generic paths reset the pointer per descriptor and are unaffected.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-74709"
  ],
  "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: clear metadata pointer when no timestamp is requested\n\nUser space can change metadata flags after request processing. Rereading\nthem during completion can therefore make the kernel write a timestamp\nthat was not requested when the packet was submitted.\n\nClear the metadata pointer during request processing unless timestamp\ncompletion is requested. Completion handling can then use the pointer\nitself instead of rereading the flags.\n\nOn the mlx5 multi-packet WQE path metadata is evaluated per batch:\nxsk_tx_metadata_request() runs only for the descriptor that starts a\nsession, just like the checksum offload that is applied once through the\nshared WQE. Only that descriptor\u0027s pointer is reset, so completion\nhandling can record a timestamp for the other descriptors of the session\nregardless of their own XDP_TXMD_FLAGS_TIMESTAMP bit. The write stays\ninside the metadata area; the single-WQE, other zero-copy, and generic\npaths reset the pointer per descriptor and are unaffected.",
  "id": "GHSA-gg32-fqwc-p469",
  "modified": "2026-08-22T18:30:30Z",
  "published": "2026-08-22T18:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74709"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0ba2e1eb07a826d021344e2f146b6716c58139eb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9f60a67df8d3c862503bee62bada8e7089cba438"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eb4c613d4ebc3f664e70d572b8867ba114a8754e"
    }
  ],
  "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-2026-74709 (GCVE-0-2026-74709)

FKIE_CVE-2026-74709

GHSA-GG32-FQWC-P469

Tags

Sightings

Nomenclature