Vulnerability-Lookup

GHSA-5679-M6C7-F7X8

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33

Details

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

net: enetc: check the number of BDs needed for xdp_frame

The size of xdp_redirect_arr array is ENETC_MAX_SKB_FRAGS. However, the number of fragments contained in xdp_frame may be greater than or equal to ENETC_MAX_SKB_FRAGS, which will cause the access to xdp_redirect_arr to be out of bounds.

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72399"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:13Z",
    "severity": "CRITICAL"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: enetc: check the number of BDs needed for xdp_frame\n\nThe size of xdp_redirect_arr array is ENETC_MAX_SKB_FRAGS. However, the\nnumber of fragments contained in xdp_frame may be greater than or equal\nto ENETC_MAX_SKB_FRAGS, which will cause the access to xdp_redirect_arr\nto be out of bounds.",
  "id": "GHSA-5679-m6c7-f7x8",
  "modified": "2026-08-17T06:33:27Z",
  "published": "2026-08-15T06:32:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72399"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1681cc7974a6123f5d5740b03bc11e4784bd2542"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1ecb199b0e6d12ab6c26c0b7edf1a8f4472d9aed"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/555c5475e787802eeae0d2b91c2f66c330db2767"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cfbc6e9b84dcc0aa2d65c84ea4745af327763209"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d22829101ab675607ad6c3d420fb3ab875f46bbb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f55276160ffad3e235b657ee4b7304eb99b90e5c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-72399 (GCVE-0-2026-72399)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:56 – Updated: 2026-08-17 05:43

Title

net: enetc: check the number of BDs needed for xdp_frame

Summary

In the Linux kernel, the following vulnerability has been resolved: net: enetc: check the number of BDs needed for xdp_frame The size of xdp_redirect_arr array is ENETC_MAX_SKB_FRAGS. However, the number of fragments contained in xdp_frame may be greater than or equal to ENETC_MAX_SKB_FRAGS, which will cause the access to xdp_redirect_arr to be out of bounds.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/1ecb199b0e6d12ab6…
https://git.kernel.org/stable/c/f55276160ffad3e23…
https://git.kernel.org/stable/c/cfbc6e9b84dcc0aa2…
https://git.kernel.org/stable/c/1681cc7974a6123f5…
https://git.kernel.org/stable/c/d22829101ab675607…
https://git.kernel.org/stable/c/555c5475e787802ee…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 9d2b68cc108db2fdb35022ed2d88cfb305c441a6 , < 1ecb199b0e6d12ab6c26c0b7edf1a8f4472d9aed (git) Affected: 9d2b68cc108db2fdb35022ed2d88cfb305c441a6 , < f55276160ffad3e235b657ee4b7304eb99b90e5c (git) Affected: 9d2b68cc108db2fdb35022ed2d88cfb305c441a6 , < cfbc6e9b84dcc0aa2d65c84ea4745af327763209 (git) Affected: 9d2b68cc108db2fdb35022ed2d88cfb305c441a6 , < 1681cc7974a6123f5d5740b03bc11e4784bd2542 (git) Affected: 9d2b68cc108db2fdb35022ed2d88cfb305c441a6 , < d22829101ab675607ad6c3d420fb3ab875f46bbb (git) Affected: 9d2b68cc108db2fdb35022ed2d88cfb305c441a6 , < 555c5475e787802eeae0d2b91c2f66c330db2767 (git)
Linux	Linux	Affected: 5.13 Unaffected: 0 , < 5.13 (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/freescale/enetc/enetc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1ecb199b0e6d12ab6c26c0b7edf1a8f4472d9aed",
              "status": "affected",
              "version": "9d2b68cc108db2fdb35022ed2d88cfb305c441a6",
              "versionType": "git"
            },
            {
              "lessThan": "f55276160ffad3e235b657ee4b7304eb99b90e5c",
              "status": "affected",
              "version": "9d2b68cc108db2fdb35022ed2d88cfb305c441a6",
              "versionType": "git"
            },
            {
              "lessThan": "cfbc6e9b84dcc0aa2d65c84ea4745af327763209",
              "status": "affected",
              "version": "9d2b68cc108db2fdb35022ed2d88cfb305c441a6",
              "versionType": "git"
            },
            {
              "lessThan": "1681cc7974a6123f5d5740b03bc11e4784bd2542",
              "status": "affected",
              "version": "9d2b68cc108db2fdb35022ed2d88cfb305c441a6",
              "versionType": "git"
            },
            {
              "lessThan": "d22829101ab675607ad6c3d420fb3ab875f46bbb",
              "status": "affected",
              "version": "9d2b68cc108db2fdb35022ed2d88cfb305c441a6",
              "versionType": "git"
            },
            {
              "lessThan": "555c5475e787802eeae0d2b91c2f66c330db2767",
              "status": "affected",
              "version": "9d2b68cc108db2fdb35022ed2d88cfb305c441a6",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/freescale/enetc/enetc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "lessThan": "5.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "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": "6.1.178",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.97",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: enetc: check the number of BDs needed for xdp_frame\n\nThe size of xdp_redirect_arr array is ENETC_MAX_SKB_FRAGS. However, the\nnumber of fragments contained in xdp_frame may be greater than or equal\nto ENETC_MAX_SKB_FRAGS, which will cause the access to xdp_redirect_arr\nto be out of bounds."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - Remote attackers can deliver multi-fragment frames to an XDP-enabled ingress path that bpf_redirect_map/devmap forwards to an ENETC PF netdev, reaching enetc_xdp_xmit via the standard XDP_REDIRECT flush path without local access.\nAC:L - Once XDP redirect to ENETC is deployed, an attacker can reliably craft or segment traffic to produce xdp_frames with nr_frags+1\u003e13; no race or uncontrollable memory layout is required to trigger the out-of-bounds write.\nPR:N - Exploitation requires no attacker privileges when XDP redirect is pre-deployed on the gateway (normal for edge filtering); unprivileged users with CAP_NET_ADMIN via user namespaces can also attach the needed BPF/XDP programs.\nUI:N - No victim interaction is required beyond sending crafted network traffic; exploitation is fully attacker-driven once the XDP redirect datapath exists.\nS:U - Impact is confined to kernel memory corruption and privilege escalation within the same kernel/host security boundary, not a cross-VM or IOMMU scope change.\nC:H - Stack out-of-bounds writes of enetc_tx_swbd structures past a 13-element array corrupt adjacent stack data and pointers, providing a memory-corruption primitive that can be leveraged for arbitrary kernel memory disclosure.\nI:H - The overflow writes attacker-influenced enetc_tx_swbd fields (DMA addresses, lengths, frame pointers) beyond the buffer bounds, enabling heap/stack corruption suitable for arbitrary write and potential code execution.\nA:H - Corrupting stack-resident transmit metadata and pointers in enetc_xdp_xmit can cause immediate kernel oops/panic or hung transmit paths, constituting total loss of availability."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:43:41.891Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1ecb199b0e6d12ab6c26c0b7edf1a8f4472d9aed"
        },
        {
          "url": "https://git.kernel.org/stable/c/f55276160ffad3e235b657ee4b7304eb99b90e5c"
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          "url": "https://git.kernel.org/stable/c/1681cc7974a6123f5d5740b03bc11e4784bd2542"
        },
        {
          "url": "https://git.kernel.org/stable/c/d22829101ab675607ad6c3d420fb3ab875f46bbb"
        },
        {
          "url": "https://git.kernel.org/stable/c/555c5475e787802eeae0d2b91c2f66c330db2767"
        }
      ],
      "title": "net: enetc: check the number of BDs needed for xdp_frame",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72399",
    "datePublished": "2026-08-15T05:56:24.926Z",
    "dateReserved": "2026-08-09T03:40:39.925Z",
    "dateUpdated": "2026-08-17T05:43:41.891Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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GHSA-5679-M6C7-F7X8

CVE-2026-72399 (GCVE-0-2026-72399)

Tags

Sightings

Nomenclature