{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-53182",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-53182"
  ],
  "published": "2026-06-25T08:41:40Z",
  "summary": "wifi: nl80211: reject oversized EMA RNR lists",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: nl80211: reject oversized EMA RNR lists\n\nnl80211_parse_rnr_elems() stores the parsed element count in a\nu8-backed cfg80211_rnr_elems::cnt field and uses that count to size\nthe flexible array allocation.\n\nReject nested NL80211_ATTR_EMA_RNR_ELEMS input once the count reaches\n255, before incrementing it again. This keeps the parser aligned with\nthe data structure it fills and matches the existing bound check used\nby nl80211_parse_mbssid_elems().",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-53182"
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    "upstream_modified": "2026-08-05T13:16:28Z",
    "severity": {
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      "scenario": "AV:L - The vulnerable parser is reached through local nl80211 generic-netlink commands that configure AP beacon data, not by received WiFi frames or remote network traffic.\nAC:L - An attacker who can send the command can deterministically provide 256 or more nested EMA RNR elements; there is no race or condition outside the attacker's control beyond targeting an affected AP-capable configuration.\nPR:L - The commands require CAP_NET_ADMIN via GENL_UNS_ADMIN_PERM, which is checked in the relevant network namespace; under kernel scoring guidance this is low privilege because CAP_NET_ADMIN may be available through user namespaces.\nUI:N - No victim action is required after the attacker sends the crafted nl80211 request.\nS:U - The corruption occurs inside the kernel and impacts the same kernel security authority; it is not a VM escape or other cross-scope boundary violation.\nC:H - The u8 count wrap causes an undersized flexible-array allocation followed by attacker-influenced out-of-bounds heap writes, which is memory corruption plausibly usable for kernel memory disclosure.\nI:H - The bug is a kernel heap out-of-bounds write of RNR element metadata past the allocation, making arbitrary corruption or control-flow compromise defensible.\nA:H - The same heap corruption can readily crash or panic the kernel even if not weaponized for code execution."
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}