{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-23246",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-23246"
  ],
  "published": "2026-03-18T10:05:24Z",
  "summary": "wifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration\n\nlink_id is taken from the ML Reconfiguration element (control & 0x000f),\nso it can be 0..15. link_removal_timeout[] has IEEE80211_MLD_MAX_NUM_LINKS\n(15) elements, so index 15 is out-of-bounds. Skip subelements with\nlink_id >= IEEE80211_MLD_MAX_NUM_LINKS to avoid a stack out-of-bounds\nwrite.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23246"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/650981e718e68005ca2760a6358134b8a98ebea4"
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      "url": "https://git.kernel.org/stable/c/bfde158d5d1322c0c2df398a8d1ccce04943be2e"
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  "database_specific": {
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    "upstream_modified": "2026-08-05T13:16:28Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 8.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:A - The vulnerability is triggered by processing crafted WiFi beacon frames received over the air. The attacker must be within WiFi range of the victim device (adjacent network).\nAC:L - The attacker can reliably trigger this by broadcasting crafted beacon frames with a spoofed BSSID containing a malicious ML Reconfiguration element. No special conditions beyond WiFi proximity are needed once the victim is associated.\nPR:N - No privileges or authentication are required. WiFi beacon frames are unencrypted management frames that any device in range can inject by spoofing the associated AP's BSSID.\nUI:N - No user interaction is required. The victim device automatically processes beacon frames from its associated AP while connected to a WiFi network.\nS:U - The vulnerability affects the kernel itself; exploitation stays within the same security authority (kernel context). There is no crossing of a virtualization or sandbox boundary.\nC:H - This is a stack-based out-of-bounds write where the attacker controls the written value. Stack corruption can be leveraged to read arbitrary memory through carefully crafted exploitation techniques.\nI:H - The stack-based buffer overflow allows the attacker to write a controlled 2-byte value past the array bounds on the stack, potentially corrupting return addresses or other stack data, which can lead to arbitrary code execution in kernel context.\nA:H - The stack corruption will at minimum cause a kernel crash/oops, resulting in a denial of service. Stack buffer overflows reliably crash the kernel when they corrupt critical stack data."
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}