{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-68255",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2025-68255"
  ],
  "published": "2025-12-16T14:45:21Z",
  "summary": "staging: rtl8723bs: fix stack buffer overflow in OnAssocReq IE parsing",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix stack buffer overflow in OnAssocReq IE parsing\n\nThe Supported Rates IE length from an incoming Association Request frame\nwas used directly as the memcpy() length when copying into a fixed-size\n16-byte stack buffer (supportRate). A malicious station can advertise an\nIE length larger than 16 bytes, causing a stack buffer overflow.\n\nClamp ie_len to the buffer size before copying the Supported Rates IE,\nand correct the bounds check when merging Extended Supported Rates to\nprevent a second potential overflow.\n\nThis prevents kernel stack corruption triggered by malformed association\nrequests.",
  "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:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.160",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-68255"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/49b7806851f93fd342838c93f4f765e0cc5029b0"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4445adedae770037078803d1ce41f9e88a1944b6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d129dc2a5d59b4d9cd2cc0b6eeb04df8461199f0"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/34620eb602aa432f090b2b784ee5c5070fb16cf9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/61871c83259a511980ec2664964cecc69005398b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/25411f5fcf5743131158f337c99c2bbf3f8477f5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e841d8ea722315b781c4fc5bf4f7670fbca88875"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6ef0e1c10455927867cac8f0ed6b49f328f8cf95"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T12:19:11Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 8.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:A - A nearby station can send a crafted 802.11 Association or Reassociation Request through the rtl8723bs AP receive path; dependence on Wi-Fi radio range and channel makes this Adjacent.\nAC:L - The attacker controls the authentication exchange and malformed IE contents, with no race or uncontrollable condition required. Oversized copies deterministically corrupt the stack or trigger hardening checks.\nPR:N - Open System authentication creates the required station state without credentials. The overflow occurs before WPA/RSN credential proof or the four-way handshake.\nUI:N - Once the device is operating as an access point, receiving the malicious frames requires no victim action.\nS:U - The vulnerable driver and the compromised kernel resources belong to the same operating-system security authority.\nC:H - The attacker-controlled overwrite can reach saved return state, enabling control-flow hijacking and arbitrary kernel-memory disclosure in a successful exploit.\nI:H - The copies can write hundreds of attacker-controlled bytes beyond the stack array and reach return state, supporting kernel code execution and arbitrary modification.\nA:H - The overflow corrupts the stack canary or triggers fortify checks, causing a kernel panic or fatal fault, and an attacker can repeat it after recovery."
    }
  }
}