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.
Severity
8.3 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
Assigner
References
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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          "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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              "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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    "dateUpdated": "2026-08-19T16:31:13.791Z",
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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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/wireless/microchip/wilc1000/hif.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"c5c77ba18ea66aa05441c71e38473efb787705a4\",\"lessThan\":\"d79b92417f33424ff23dad76716ed8f2cefb1083\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c5c77ba18ea66aa05441c71e38473efb787705a4\",\"lessThan\":\"b81d0ea9e1daa215b3da68c1f4f6fb07940c2f6a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c5c77ba18ea66aa05441c71e38473efb787705a4\",\"lessThan\":\"8d50acf5420de0c4da99c2d634731c9d3164a755\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c5c77ba18ea66aa05441c71e38473efb787705a4\",\"lessThan\":\"584c8954ad55f8b09b475be6db710fe40ceb988c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c5c77ba18ea66aa05441c71e38473efb787705a4\",\"lessThan\":\"4d410320e8ae5933e651660c9fadc1d380309e23\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c5c77ba18ea66aa05441c71e38473efb787705a4\",\"lessThan\":\"e511e93abd6eeedcd5b3c55516241f414fbde64a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c5c77ba18ea66aa05441c71e38473efb787705a4\",\"lessThan\":\"8ccdf8c8de87a9580df37c3c1ec53ba88cedef65\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c5c77ba18ea66aa05441c71e38473efb787705a4\",\"lessThan\":\"4c4c97b60a5e978121d9ee8cb0ab3916e5d6a8de\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/wireless/microchip/wilc1000/hif.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.2\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.2\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.265\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.216\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.183\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.148\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.101\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.42\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.6\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H\",\"baseScore\":8.3,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.5}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4c4c97b60a5e978121d9ee8cb0ab3916e5d6a8de\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4d410320e8ae5933e651660c9fadc1d380309e23\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/584c8954ad55f8b09b475be6db710fe40ceb988c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8ccdf8c8de87a9580df37c3c1ec53ba88cedef65\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8d50acf5420de0c4da99c2d634731c9d3164a755\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b81d0ea9e1daa215b3da68c1f4f6fb07940c2f6a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d79b92417f33424ff23dad76716ed8f2cefb1083\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e511e93abd6eeedcd5b3c55516241f414fbde64a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-14T17:30:09+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": "119",
      "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": "2026-08-13T01:28:16Z",
      "cve": "CVE-2026-68196",
      "id": "CVE-2026-68196",
      "initial_release_date": "2026-08-12T16:22:49Z",
      "product_status:known_affected": "193",
      "product_status:known_not_affected": "103",
      "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": "3"
    }
  }
}



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Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.