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CVE-2026-64445

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix WEP length underflow and OOB read in OnAuth() OnAuth() has two bugs in the shared-key authentication path. When the Privacy bit is set, rtw_wep_decrypt() is called without verifying that the frame is long enough to contain a valid WEP IV and ICV. Inside rtw_wep_decrypt(), length is computed as: length = len - WLAN_HDR_A3_LEN - iv_len and then passed as (length - 4) to crc32_le(). If len is less than WLAN_HDR_A3_LEN + iv_len + icv_len (32 bytes), length - 4 is negative and, after the implicit cast to size_t, causes crc32_le() to read far beyond the frame buffer. Add a minimum length check before accessing the IV field and calling the decryption path. When processing a seq=3 response, rtw_get_ie() stores the Challenge Text IE length in ie_len, but the subsequent memcmp() always reads 128 bytes regardless of ie_len. IEEE 802.11 mandates a challenge text of exactly 128 bytes; reject any IE whose length field differs, matching the check already applied to OnAuthClient().

Severity
HIGH
CVSS score
8.8 (v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-07-25 10:17:29.177000
Last modified
2026-10-19 21:17:39.277000
View original CVE JSON 
{
  "id": "CVE-2026-64445",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-07-25T10:17:29.177",
  "lastModified": "2026-10-19T21:17:39.277",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix WEP length underflow and OOB read in OnAuth()\n\nOnAuth() has two bugs in the shared-key authentication path.\n\nWhen the Privacy bit is set, rtw_wep_decrypt() is called without\nverifying that the frame is long enough to contain a valid WEP IV and\nICV.  Inside rtw_wep_decrypt(), length is computed as:\n\n    length = len - WLAN_HDR_A3_LEN - iv_len\n\nand then passed as (length - 4) to crc32_le().  If len is less than\nWLAN_HDR_A3_LEN + iv_len + icv_len (32 bytes), length - 4 is negative\nand, after the implicit cast to size_t, causes crc32_le() to read far\nbeyond the frame buffer.  Add a minimum length check before accessing\nthe IV field and calling the decryption path.\n\nWhen processing a seq=3 response, rtw_get_ie() stores the Challenge\nText IE length in ie_len, but the subsequent memcmp() always reads 128\nbytes regardless of ie_len.  IEEE 802.11 mandates a challenge text of\nexactly 128 bytes; reject any IE whose length field differs, matching\nthe check already applied to OnAuthClient()."
    }
  ],
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          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "attackVector": "ADJACENT_NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
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          "role": "CISA Coordinator",
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  "weaknesses": [
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