Vulnerability-Lookup

FKIE_CVE-2026-64030

Vulnerability from fkie_nvd - Published: 2026-07-19 16:17 - Updated: 2026-07-30 14:59

Severity

8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: bounds-check link_id in ieee80211_ml_epcs IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID is 0x000f, so link_id extracted from a PRIO_ACCESS ML element PER_STA_PROFILE subelement can be 0..15. sdata->link[] has IEEE80211_MLD_MAX_NUM_LINKS (15) entries (indices 0..14), making index 15 out-of-bounds. A connected WiFi 7 AP can trigger this by sending an EPCS Enable Response action frame with a PER_STA_PROFILE subelement where link_id = 15. The unsolicited-notification path (dialog_token = 0) is reachable any time EPCS is already enabled, without any prior client request. sdata->link[15] reads into the first word of sdata->activate_links_work (a wiphy_work whose embedded list_head is non-NULL after INIT_LIST_HEAD), so the NULL check on the result does not catch the invalid access. The garbage pointer is then passed to ieee80211_sta_wmm_params(), which dereferences link->sdata and crashes the kernel. The same class of bug was fixed for ieee80211_ml_reconfiguration() by commit 162d331d833d ("wifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration").

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2d8379834800c30602f24c71ab7c40f5fe84d200
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/863f1f02a3bd70dbd857b8ac4070292fde8cb4e2
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f718506edd2d9c6a308ded9d13c632bf7b7d5a2c

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/mlme.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2d8379834800c30602f24c71ab7c40f5fe84d200",
              "status": "affected",
              "version": "de86c5f60839dc0d771711a848b4f55ad3f90844",
              "versionType": "git"
            },
            {
              "lessThan": "863f1f02a3bd70dbd857b8ac4070292fde8cb4e2",
              "status": "affected",
              "version": "de86c5f60839dc0d771711a848b4f55ad3f90844",
              "versionType": "git"
            },
            {
              "lessThan": "f718506edd2d9c6a308ded9d13c632bf7b7d5a2c",
              "status": "affected",
              "version": "de86c5f60839dc0d771711a848b4f55ad3f90844",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/mlme.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": "6.18.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "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\nwifi: mac80211: bounds-check link_id in ieee80211_ml_epcs\n\nIEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID is 0x000f, so link_id extracted\nfrom a PRIO_ACCESS ML element PER_STA_PROFILE subelement can be 0..15.\nsdata-\u003elink[] has IEEE80211_MLD_MAX_NUM_LINKS (15) entries (indices 0..14),\nmaking index 15 out-of-bounds.\n\nA connected WiFi 7 AP can trigger this by sending an EPCS Enable Response\naction frame with a PER_STA_PROFILE subelement where link_id = 15.  The\nunsolicited-notification path (dialog_token = 0) is reachable any time\nEPCS is already enabled, without any prior client request.\n\nsdata-\u003elink[15] reads into the first word of sdata-\u003eactivate_links_work\n(a wiphy_work whose embedded list_head is non-NULL after INIT_LIST_HEAD),\nso the NULL check on the result does not catch the invalid access.  The\ngarbage pointer is then passed to ieee80211_sta_wmm_params(), which\ndereferences link-\u003esdata and crashes the kernel.\n\nThe same class of bug was fixed for ieee80211_ml_reconfiguration() by\ncommit 162d331d833d (\"wifi: mac80211: bounds-check link_id in\nieee80211_ml_reconfiguration\")."
    }
  ],
  "id": "CVE-2026-64030",
  "lastModified": "2026-07-30T14:59:47.950",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-07-19T16:17:43.147",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2d8379834800c30602f24c71ab7c40f5fe84d200"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/863f1f02a3bd70dbd857b8ac4070292fde8cb4e2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f718506edd2d9c6a308ded9d13c632bf7b7d5a2c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

CVE-2026-64030 (GCVE-0-2026-64030)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:39 – Updated: 2026-08-05 12:38

Title

wifi: mac80211: bounds-check link_id in ieee80211_ml_epcs

Summary

Severity

8.8 (High)


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

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/2d8379834800c3060…
https://git.kernel.org/stable/c/863f1f02a3bd70dbd…
https://git.kernel.org/stable/c/f718506edd2d9c6a3…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: de86c5f60839dc0d771711a848b4f55ad3f90844 , < 2d8379834800c30602f24c71ab7c40f5fe84d200 (git) Affected: de86c5f60839dc0d771711a848b4f55ad3f90844 , < 863f1f02a3bd70dbd857b8ac4070292fde8cb4e2 (git) Affected: de86c5f60839dc0d771711a848b4f55ad3f90844 , < f718506edd2d9c6a308ded9d13c632bf7b7d5a2c (git)
Linux	Linux	Affected: 6.15 Unaffected: 0 , < 6.15 (semver) Unaffected: 6.18.34 , ≤ 6.18.* (semver) Unaffected: 7.0.11 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/mlme.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2d8379834800c30602f24c71ab7c40f5fe84d200",
              "status": "affected",
              "version": "de86c5f60839dc0d771711a848b4f55ad3f90844",
              "versionType": "git"
            },
            {
              "lessThan": "863f1f02a3bd70dbd857b8ac4070292fde8cb4e2",
              "status": "affected",
              "version": "de86c5f60839dc0d771711a848b4f55ad3f90844",
              "versionType": "git"
            },
            {
              "lessThan": "f718506edd2d9c6a308ded9d13c632bf7b7d5a2c",
              "status": "affected",
              "version": "de86c5f60839dc0d771711a848b4f55ad3f90844",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/mlme.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": "6.18.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.34",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.11",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: bounds-check link_id in ieee80211_ml_epcs\n\nIEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID is 0x000f, so link_id extracted\nfrom a PRIO_ACCESS ML element PER_STA_PROFILE subelement can be 0..15.\nsdata-\u003elink[] has IEEE80211_MLD_MAX_NUM_LINKS (15) entries (indices 0..14),\nmaking index 15 out-of-bounds.\n\nA connected WiFi 7 AP can trigger this by sending an EPCS Enable Response\naction frame with a PER_STA_PROFILE subelement where link_id = 15.  The\nunsolicited-notification path (dialog_token = 0) is reachable any time\nEPCS is already enabled, without any prior client request.\n\nsdata-\u003elink[15] reads into the first word of sdata-\u003eactivate_links_work\n(a wiphy_work whose embedded list_head is non-NULL after INIT_LIST_HEAD),\nso the NULL check on the result does not catch the invalid access.  The\ngarbage pointer is then passed to ieee80211_sta_wmm_params(), which\ndereferences link-\u003esdata and crashes the kernel.\n\nThe same class of bug was fixed for ieee80211_ml_reconfiguration() by\ncommit 162d331d833d (\"wifi: mac80211: bounds-check link_id in\nieee80211_ml_reconfiguration\")."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - A malicious or compromised WiFi 7 AP transmits a crafted EPCS Enable Response action frame over the wireless link; exploitation requires proximity on the same WiFi segment, not remote internet reachability.\nAC:L - Once a victim WiFi 7 MLD station is associated with an EPCS-capable AP, the attacker reliably triggers the bug by setting link_id=15 in a PER_STA_PROFILE subelement, including via the unsolicited notification path (dialog_token=0) when EPCS is already enabled.\nPR:N - The attacker acts as the associated AP sending forged management frames and needs no local privileges, accounts, or capabilities on the victim system.\nUI:N - After association and EPCS enablement, the kernel processes the malicious frame automatically with no further victim action required at exploit time.\nS:U - Impact is confined to kernel memory corruption and crash on the victim station; it does not cross a VM, IOMMU, or sandbox security boundary.\nC:H - Out-of-bounds read of sdata-\u003elink[15] pulls a kernel pointer from adjacent sdata-\u003eactivate_links_work memory, and the resulting bogus pointer is dereferenced as ieee80211_link_data, constituting an unbounded kernel memory read primitive.\nI:H - The out-of-bounds pointer is used as a valid ieee80211_link_data structure; if execution proceeds past the initial dereference, _ieee80211_sta_wmm_params() can write to link-\u003etx_conf[] at incorrect offsets, enabling potential kernel memory corruption beyond a simple fault.\nA:H - The invalid pointer dereference in ieee80211_sta_wmm_params() causes a kernel oops/panic, resulting in complete loss of availability for the victim system."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:38:24.204Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2d8379834800c30602f24c71ab7c40f5fe84d200"
        },
        {
          "url": "https://git.kernel.org/stable/c/863f1f02a3bd70dbd857b8ac4070292fde8cb4e2"
        },
        {
          "url": "https://git.kernel.org/stable/c/f718506edd2d9c6a308ded9d13c632bf7b7d5a2c"
        }
      ],
      "title": "wifi: mac80211: bounds-check link_id in ieee80211_ml_epcs",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64030",
    "datePublished": "2026-07-19T15:39:20.982Z",
    "dateReserved": "2026-07-19T07:54:57.028Z",
    "dateUpdated": "2026-08-05T12:38:24.204Z",
    "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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FKIE_CVE-2026-64030

CVE-2026-64030 (GCVE-0-2026-64030)

Tags

Sightings

Nomenclature

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