{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-64030",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-64030"
  ],
  "published": "2026-07-19T15:41:06Z",
  "summary": "wifi: mac80211: bounds-check link_id in ieee80211_ml_epcs",
  "details": "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->link[] 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->link[15] reads into the first word of sdata->activate_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->sdata 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\").",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:13",
        "name": "linux"
      },
      "versions": [
        "1:6.18.29-1+rpt1",
        "1:6.18.33-1+rpt1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.18.29+rpt-rpi-2712",
            "binary_version": "1:6.18.29-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.18.29+rpt-rpi-v6",
            "binary_version": "1:6.18.29-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.18.29+rpt-rpi-v7",
            "binary_version": "1:6.18.29-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.18.29+rpt-rpi-v8",
            "binary_version": "1:6.18.29-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.18.29+rpt-rpi-v8-rt",
            "binary_version": "1:6.18.29-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.18.33+rpt-rpi-2712",
            "binary_version": "1:6.18.33-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.18.33+rpt-rpi-v6",
            "binary_version": "1:6.18.33-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.18.33+rpt-rpi-v7",
            "binary_version": "1:6.18.33-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.18.33+rpt-rpi-v8",
            "binary_version": "1:6.18.33-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.18.33+rpt-rpi-v8-rt",
            "binary_version": "1:6.18.33-1+rpt1"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.18.29-1+rpt1": {
            "linux_commit": "66318c5b5cd8145a662303af12ed39ac07eb27cc",
            "upstream_version": "6.18.29",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.18.34"
          },
          "1:6.18.33-1+rpt1": {
            "linux_commit": "95b85bebbedcaedfa7ca79116ed38b7376fba412",
            "upstream_version": "6.18.33",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.18.34"
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-64030"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2d8379834800c30602f24c71ab7c40f5fe84d200"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/863f1f02a3bd70dbd857b8ac4070292fde8cb4e2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f718506edd2d9c6a308ded9d13c632bf7b7d5a2c"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T13:16:28Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 8.8,
      "cvss_v3_severity": "High",
      "scenario": "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->link[15] pulls a kernel pointer from adjacent sdata->activate_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->tx_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."
    }
  }
}