CVE-2025-68256 (GCVE-0-2025-68256)
Vulnerability from cvelistv5
Published
2025-12-16 14:44
Modified
2026-08-05 12:10
Severity ?
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix out-of-bounds read in rtw_get_ie() parser The Information Element (IE) parser rtw_get_ie() trusted the length byte of each IE without validating that the IE body (len bytes after the 2-byte header) fits inside the remaining frame buffer. A malformed frame can advertise an IE length larger than the available data, causing the parser to increment its pointer beyond the buffer end. This results in out-of-bounds reads or, depending on the pattern, an infinite loop. Fix by validating that (offset + 2 + len) does not exceed the limit before accepting the IE or advancing to the next element. This prevents OOB reads and ensures the parser terminates safely on malformed frames.
References
Impacted products
Vendor Product Version
Linux Linux Version: 554c0a3abf216c991c5ebddcdb2c08689ecd290b
Version: 554c0a3abf216c991c5ebddcdb2c08689ecd290b
Version: 554c0a3abf216c991c5ebddcdb2c08689ecd290b
Version: 554c0a3abf216c991c5ebddcdb2c08689ecd290b
Version: 554c0a3abf216c991c5ebddcdb2c08689ecd290b
Version: 554c0a3abf216c991c5ebddcdb2c08689ecd290b
Version: 554c0a3abf216c991c5ebddcdb2c08689ecd290b
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/staging/rtl8723bs/core/rtw_ieee80211.c"
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          "programFiles": [
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          "vendor": "Linux",
          "versions": [
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              "version": "0",
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              "version": "6.12.62",
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              "status": "unaffected",
              "version": "6.17.12",
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            {
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              "status": "unaffected",
              "version": "6.18.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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                  "versionStartIncluding": "4.12",
                  "vulnerable": true
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              ],
              "negate": false,
              "operator": "OR"
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix out-of-bounds read in rtw_get_ie() parser\n\nThe Information Element (IE) parser rtw_get_ie() trusted the length\nbyte of each IE without validating that the IE body (len bytes after\nthe 2-byte header) fits inside the remaining frame buffer. A malformed\nframe can advertise an IE length larger than the available data, causing\nthe parser to increment its pointer beyond the buffer end. This results\nin out-of-bounds reads or, depending on the pattern, an infinite loop.\n\nFix by validating that (offset + 2 + len) does not exceed the limit\nbefore accepting the IE or advancing to the next element.\n\nThis prevents OOB reads and ensures the parser terminates safely on\nmalformed frames."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - Attacker-controlled 802.11 management frames reach the parser over the air, requiring only proximity to the affected RTL8723BS WiFi device.\nAC:L - The malformed IE length is directly attacker-controlled and deterministically triggers the faulty parsing without a race or condition outside the attacker\u2019s influence.\nPR:N - Beacons and authentication frames are processed before authentication, while the 802.11w path performs the dangerous write before MIC verification.\nUI:N - An active, scanning, connecting, or connected wireless interface automatically processes injected frames without victim action.\nS:U - The vulnerability compromises the host kernel containing the affected driver and does not cross a separate virtualization or hardware security boundary.\nC:H - The unchecked length can drive substantial out-of-bounds reads of kernel memory through downstream callers, including copying out-of-frame data into retransmitted authentication state.\nI:H - A truncated Challenge IE can drive a 255-byte memcpy into a 128-byte MLME buffer, and a malformed MMIE can cause an offset-controlled eight-byte heap overwrite before cryptographic verification.\nA:H - The out-of-bounds reads and writes can cause kernel faults or memory corruption, and malformed frames can be injected repeatedly to crash or destabilize the device."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:10:31.326Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9829c6e1b2e4180fd18315252ad6faeab6128076"
        },
        {
          "url": "https://git.kernel.org/stable/c/b977eb31802817f4a37da95bf16bfdaa1eeb5fc2"
        },
        {
          "url": "https://git.kernel.org/stable/c/30c558447e90935f0de61be181bbcedf75952e00"
        },
        {
          "url": "https://git.kernel.org/stable/c/a54e2b2db1b7de2e008b4f62eec35aaefcc663c5"
        },
        {
          "url": "https://git.kernel.org/stable/c/df191dd9f4c7249d98ada55634fa8ac19089b8cb"
        },
        {
          "url": "https://git.kernel.org/stable/c/c0d93d69e1472ba75b78898979b90a98ba2a2501"
        },
        {
          "url": "https://git.kernel.org/stable/c/154828bf9559b9c8421fc2f0d7f7f76b3683aaed"
        }
      ],
      "title": "staging: rtl8723bs: fix out-of-bounds read in rtw_get_ie() parser",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68256",
    "datePublished": "2025-12-16T14:44:58.829Z",
    "dateReserved": "2025-12-16T13:41:40.267Z",
    "dateUpdated": "2026-08-05T12:10:31.326Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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