GHSA-867H-2X92-CJ79
Vulnerability from github – Published: 2026-10-06 09:31 – Updated: 2026-10-06 09:31In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: avoid out-of-bounds read for empty PREQ elements
ieee80211_mesh_preq_size_ok() derives the location of the PREQ bottom fields before checking whether the element contains even the fixed header. ieee80211_mesh_hwmp_preq_get_bottom() reads the flags byte to account for the optional Address Extension field. Consequently, an empty PREQ element causes a one-byte read beyond its declared payload.
Move the helper call after both size checks, so the bottom fields are only accessed when they are present.
{
"affected": [],
"aliases": [
"CVE-2026-98183"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-06T09:18:03Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: avoid out-of-bounds read for empty PREQ elements\n\nieee80211_mesh_preq_size_ok() derives the location of the PREQ bottom\nfields before checking whether the element contains even the fixed\nheader. ieee80211_mesh_hwmp_preq_get_bottom() reads the flags byte to\naccount for the optional Address Extension field. Consequently, an\nempty PREQ element causes a one-byte read beyond its declared payload.\n\nMove the helper call after both size checks, so the bottom fields are\nonly accessed when they are present.",
"id": "GHSA-867h-2x92-cj79",
"modified": "2026-10-06T09:31:29Z",
"published": "2026-10-06T09:31:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98183"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3beddbd56946577478fd5e649f556aaaebe15b0a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e6031f02269c0f51cf67886d177f02bc300b47cd"
}
],
"schema_version": "1.4.0",
"severity": []
}
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