CVE-2025-68256 (GCVE-0-2025-68256)
Vulnerability from cvelistv5
Published
2025-12-16 14:44
Modified
2025-12-16 14:44
Severity ?
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: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/staging/rtl8723bs/core/rtw_ieee80211.c"
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          "vendor": "Linux",
          "versions": [
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      "descriptions": [
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          "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."
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      "providerMetadata": {
        "dateUpdated": "2025-12-16T14:44:58.829Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/154828bf9559b9c8421fc2f0d7f7f76b3683aaed"
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      ],
      "title": "staging: rtl8723bs: fix out-of-bounds read in rtw_get_ie() parser",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68256",
    "datePublished": "2025-12-16T14:44:58.829Z",
    "dateReserved": "2025-12-16T13:41:40.267Z",
    "dateUpdated": "2025-12-16T14:44:58.829Z",
    "state": "PUBLISHED"
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  }
}


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