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CVE-2025-68256 (GCVE-0-2025-68256)

Vulnerability from cvelistv5 – Published: 2025-12-16 14:44 – Updated: 2026-08-05 12:10
VLAI
Title
staging: rtl8723bs: fix out-of-bounds read in rtw_get_ie() parser
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.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 9829c6e1b2e4180fd18315252ad6faeab6128076 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < b977eb31802817f4a37da95bf16bfdaa1eeb5fc2 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 30c558447e90935f0de61be181bbcedf75952e00 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < a54e2b2db1b7de2e008b4f62eec35aaefcc663c5 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < df191dd9f4c7249d98ada55634fa8ac19089b8cb (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < c0d93d69e1472ba75b78898979b90a98ba2a2501 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 154828bf9559b9c8421fc2f0d7f7f76b3683aaed (git)
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Linux Linux Affected: 4.12
Unaffected: 0 , < 4.12 (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.160 , ≤ 6.1.* (semver)
Unaffected: 6.6.120 , ≤ 6.6.* (semver)
Unaffected: 6.12.62 , ≤ 6.12.* (semver)
Unaffected: 6.17.12 , ≤ 6.17.* (semver)
Unaffected: 6.18.1 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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          "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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    "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",
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    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-13T17:36:12+00:00",
      "cve": "CVE-2025-68256",
      "id": "CVE-2025-68256",
      "initial_release_date": "2025-12-16T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Denial of service via out-of-bounds read in rtl8723bs driver",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68256.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.