CVE-2026-68196 (GCVE-0-2026-68196)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:00 – Updated: 2026-08-19 16:31
VLAI
Title
wifi: wilc1000: validate assoc response length before subtracting header
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: wilc1000: validate assoc response length before subtracting header wilc_parse_assoc_resp_info() computes the trailing IE length as ies_len = buffer_len - sizeof(*res); without first checking that buffer_len is at least sizeof(struct wilc_assoc_resp) (6 bytes). buffer_len is the length reported for a received association response (host_int_parse_assoc_resp_info() passes hif_drv->assoc_resp / assoc_resp_info_len straight in) and must be validated before the driver accesses the fixed header. For a frame shorter than the 6-byte fixed header, the subtraction wraps. For a four-byte response the result is truncated to a u16 ies_len of 65534, so kmemdup() then attempts to copy 65534 bytes starting at buffer + sizeof(*res), beyond the valid association-response data (CWE-125). A response shorter than four bytes can also cause an out-of-bounds read of res->status_code at offsets 2 and 3. Reject frames too short to hold the fixed header before touching the header or computing ies_len. Also set the connection status to a failure on this path: the caller falls through to a "conn_info->status == WLAN_STATUS_SUCCESS" check after the parser returns, so leaving the status untouched could let a malformed short response be treated as a successful association.
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c5c77ba18ea66aa05441c71e38473efb787705a4 , < d79b92417f33424ff23dad76716ed8f2cefb1083 (git)
Affected: c5c77ba18ea66aa05441c71e38473efb787705a4 , < b81d0ea9e1daa215b3da68c1f4f6fb07940c2f6a (git)
Affected: c5c77ba18ea66aa05441c71e38473efb787705a4 , < 8d50acf5420de0c4da99c2d634731c9d3164a755 (git)
Affected: c5c77ba18ea66aa05441c71e38473efb787705a4 , < 584c8954ad55f8b09b475be6db710fe40ceb988c (git)
Affected: c5c77ba18ea66aa05441c71e38473efb787705a4 , < 4d410320e8ae5933e651660c9fadc1d380309e23 (git)
Affected: c5c77ba18ea66aa05441c71e38473efb787705a4 , < e511e93abd6eeedcd5b3c55516241f414fbde64a (git)
Affected: c5c77ba18ea66aa05441c71e38473efb787705a4 , < 8ccdf8c8de87a9580df37c3c1ec53ba88cedef65 (git)
Affected: c5c77ba18ea66aa05441c71e38473efb787705a4 , < 4c4c97b60a5e978121d9ee8cb0ab3916e5d6a8de (git)
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Linux Linux Affected: 4.2
Unaffected: 0 , < 4.2 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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Show details on NVD website

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: wilc1000: validate assoc response length before subtracting header\n\nwilc_parse_assoc_resp_info() computes the trailing IE length as\n\n\ties_len = buffer_len - sizeof(*res);\n\nwithout first checking that buffer_len is at least sizeof(struct\nwilc_assoc_resp) (6 bytes). buffer_len is the length reported for a\nreceived association response (host_int_parse_assoc_resp_info() passes\nhif_drv-\u003eassoc_resp / assoc_resp_info_len straight in) and must be\nvalidated before the driver accesses the fixed header.\n\nFor a frame shorter than the 6-byte fixed header, the subtraction wraps.\nFor a four-byte response the result is truncated to a u16 ies_len of\n65534, so kmemdup() then attempts to copy 65534 bytes starting at\nbuffer + sizeof(*res), beyond the valid association-response data\n(CWE-125). A response shorter than four bytes can also cause an\nout-of-bounds read of res-\u003estatus_code at offsets 2 and 3.\n\nReject frames too short to hold the fixed header before touching the\nheader or computing ies_len. Also set the connection status to a failure\non this path: the caller falls through to a\n\"conn_info-\u003estatus == WLAN_STATUS_SUCCESS\" check after the parser\nreturns, so leaving the status untouched could let a malformed short\nresponse be treated as a successful association."
        }
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            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H",
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              "lang": "en",
              "value": "AV:A - Exploitation requires a rogue WiFi AP to send a malformed 802.11 Association Response over the air during STA join; per kernel guidance WiFi frame injection is Adjacent, not routable Network.\nAC:L - The attacker fully controls the rogue AP and can craft sub-6-byte association responses with SUCCESS status; once the victim initiates or auto-rejoins association, the malformed frame reliably reaches the parser.\nPR:N - No privileges on the victim are required; a remote attacker operating a rogue AP triggers the bug during the standard pre-authentication WiFi association handshake without local access or credentials.\nUI:N - Exploitation does not require per-attempt user action when devices auto-reconnect to a saved SSID or join an evil-twin AP broadcasting a known network name, which is common on embedded/IoT WILC1000 deployments.\nS:U - The vulnerability is confined to kernel memory and driver state on the affected host; impact does not cross a security boundary such as VM escape, sandbox escape, or IOMMU/DMA isolation bypass.\nC:H - Integer underflow drives kmemdup() to copy up to ~65534 bytes past the 512-byte assoc_resp buffer, leaking adjacent kernel heap data that is forwarded to userspace via cfg80211_connect_bss() response IEs.\nI:L - Beyond the OOB read, a malformed short response can leave conn_info-\u003estatus as WLAN_STATUS_SUCCESS and report a bogus successful association, corrupting the device\u0027s connection integrity without granting arbitrary kernel write.\nA:H - The oversized kmemdup() memcpy reads far beyond the kmalloc-backed assoc_resp array, which can fault on unmapped memory and cause a kernel oops or panic; repeated triggers also impose severe memory pressure."
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      "title": "wifi: wilc1000: validate assoc response length before subtracting header",
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    "datePublished": "2026-08-10T12:00:14.686Z",
    "dateReserved": "2026-07-30T09:28:09.374Z",
    "dateUpdated": "2026-08-19T16:31:13.791Z",
    "state": "PUBLISHED"
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            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: wilc1000: validate assoc response length before subtracting header\n\nwilc_parse_assoc_resp_info() computes the trailing IE length as\n\n\ties_len = buffer_len - sizeof(*res);\n\nwithout first checking that buffer_len is at least sizeof(struct\nwilc_assoc_resp) (6 bytes). buffer_len is the length reported for a\nreceived association response (host_int_parse_assoc_resp_info() passes\nhif_drv-\u003eassoc_resp / assoc_resp_info_len straight in) and must be\nvalidated before the driver accesses the fixed header.\n\nFor a frame shorter than the 6-byte fixed header, the subtraction wraps.\nFor a four-byte response the result is truncated to a u16 ies_len of\n65534, so kmemdup() then attempts to copy 65534 bytes starting at\nbuffer + sizeof(*res), beyond the valid association-response data\n(CWE-125). A response shorter than four bytes can also cause an\nout-of-bounds read of res-\u003estatus_code at offsets 2 and 3.\n\nReject frames too short to hold the fixed header before touching the\nheader or computing ies_len. Also set the connection status to a failure\non this path: the caller falls through to a\n\"conn_info-\u003estatus == WLAN_STATUS_SUCCESS\" check after the parser\nreturns, so leaving the status untouched could let a malformed short\nresponse be treated as a successful association."
          }
        ],
        "id": "CVE-2026-68196",
        "lastModified": "2026-08-19T17:20:35.820",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "ADJACENT_NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 8.3,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "LOW",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 5.5,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
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        "published": "2026-08-10T13:20:07.023",
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          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/e511e93abd6eeedcd5b3c55516241f414fbde64a"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-31T11:18:26+00:00",
      "cve": "CVE-2026-68196",
      "id": "CVE-2026-68196",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "157",
      "product_status:known_not_affected": "120",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: wilc1000: validate assoc response length before subtracting header",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68196.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-22T16:46:48Z",
      "cve": "CVE-2026-68196",
      "id": "CVE-2026-68196",
      "initial_release_date": "2026-08-12T16:22:49Z",
      "product_status:first_fixed": "60",
      "product_status:known_affected": "671",
      "product_status:known_not_affected": "60",
      "product_status:recommended": "107",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68196",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68196.json",
      "version": "11"
    }
  }
}



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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

Author Source Type Date Other

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.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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