GHSA-9QR3-XG49-R8HQ

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-27 06:30
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

staging: rtl8723bs: fix OOB read in OnAssocRsp() IE loop

The IE parsing loop in OnAssocRsp() advances by (pIE->length + 2) each iteration but only guards on i < pkt_len. When a malicious AP sends an AssocResponse whose last IE has only one byte remaining in the frame (the element_id byte lands at pkt_len-1), the loop reads pIE->length from pframe[pkt_len], which is one byte past the allocated receive buffer.

Additionally, even when the header bytes are in bounds, pIE->length itself can extend the data window beyond pkt_len, silently passing a truncated IE to the handler functions.

Add two guards at the top of the loop body: 1. Break if fewer than sizeof(*pIE) bytes remain (can't read header). 2. Break if the IE's declared data extends past pkt_len.

Severity
8.1 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-64444"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:29Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix OOB read in OnAssocRsp() IE loop\n\nThe IE parsing loop in OnAssocRsp() advances by (pIE-\u003elength + 2) each\niteration but only guards on i \u003c pkt_len. When a malicious AP sends an\nAssocResponse whose last IE has only one byte remaining in the frame\n(the element_id byte lands at pkt_len-1), the loop reads pIE-\u003elength\nfrom pframe[pkt_len], which is one byte past the allocated receive buffer.\n\nAdditionally, even when the header bytes are in bounds, pIE-\u003elength\nitself can extend the data window beyond pkt_len, silently passing a\ntruncated IE to the handler functions.\n\nAdd two guards at the top of the loop body:\n  1. Break if fewer than sizeof(*pIE) bytes remain (can\u0027t read header).\n  2. Break if the IE\u0027s declared data extends past pkt_len.",
  "id": "GHSA-9qr3-xg49-r8hq",
  "modified": "2026-07-27T06:30:38Z",
  "published": "2026-07-25T12:31:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64444"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0406d746574e875d8778552eb674fcfbf5330bfb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/04f612dc03427e0b1ac80a2611b5ac0ba93ac446"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0970dd47726a57e52013594e9fbf667586eb3673"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1a52a05471494546f955a58e8c170c0c796c52d5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7e7741c8315e4160aead00a60cdd6f81ab880717"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/889ca6000ac7fa73457b041848fcb08e0d51b809"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f9654207e92283e0acac5d64fe5f8835383b5a23"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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